diff --git a/checkstyle.xml b/checkstyle.xml
index aced76b08..7a722e45b 100644
--- a/checkstyle.xml
+++ b/checkstyle.xml
@@ -1,13 +1,15 @@
 <!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
     "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
 <module name="Checker">
-  <module name="SuppressionCommentFilter">
-    <property name="offCommentFormat" value="CHECKSTYLE.OFF\: ?([\w\|]+)"/>
-    <property name="onCommentFormat" value="CHECKSTYLE.ON\: ?([\w\|]+)"/>
-    <property name="checkFormat" value="$1"/>
+  <module name="LineLength">
+    <property name="max" value="120"/>
   </module>
   <module name="TreeWalker">
-    <module name="FileContentsHolder"/>
+    <module name="SuppressionCommentFilter">
+      <property name="offCommentFormat" value="CHECKSTYLE.OFF\: ?([\w\|]+)"/>
+      <property name="onCommentFormat" value="CHECKSTYLE.ON\: ?([\w\|]+)"/>
+      <property name="checkFormat" value="$1"/>
+    </module>
     <module name="AnnotationUseStyle"/>
     <module name="MissingOverride">
       <property name="javaFiveCompatibility" value="true"/>
@@ -63,9 +65,6 @@
     <module name="ParameterName"/>
     <module name="StaticVariableName"/>
     <module name="TypeName"/>
-    <module name="LineLength">
-      <property name="max" value="120"/>
-    </module>
     <module name="GenericWhitespace"/>
     <module name="EmptyForInitializerPad"/>
     <module name="EmptyForIteratorPad"/>
diff --git a/classlib/pom.xml b/classlib/pom.xml
index f8028f7c2..b806a0149 100644
--- a/classlib/pom.xml
+++ b/classlib/pom.xml
@@ -88,17 +88,14 @@
     <dependency>
       <groupId>com.google.code.gson</groupId>
       <artifactId>gson</artifactId>
-      <version>2.2.4</version>
     </dependency>
     <dependency>
       <groupId>com.jcraft</groupId>
       <artifactId>jzlib</artifactId>
-      <version>1.1.3</version>
     </dependency>
     <dependency>
       <groupId>joda-time</groupId>
       <artifactId>joda-time</artifactId>
-      <version>2.7</version>
     </dependency>
   </dependencies>
 
@@ -107,7 +104,6 @@
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>exec-maven-plugin</artifactId>
-        <version>1.2.1</version>
         <executions>
           <execution>
             <id>generate-tz-cache</id>
diff --git a/core/pom.xml b/core/pom.xml
index dea4b9392..7d05fa4e1 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -150,7 +150,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-javadoc-plugin</artifactId>
-        <version>2.9.1</version>
+        <version>${maven-javadoc-plugin.version}</version>
         <configuration>
           <show>protected</show>
         </configuration>
diff --git a/html4j/pom.xml b/html4j/pom.xml
index f5f9dde30..3d40fe733 100644
--- a/html4j/pom.xml
+++ b/html4j/pom.xml
@@ -82,7 +82,6 @@
     <dependency>
       <groupId>com.carrotsearch</groupId>
       <artifactId>hppc</artifactId>
-      <version>0.7.3</version>
       <optional>true</optional>
     </dependency>
     <dependency>
@@ -113,12 +112,11 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.16</version>
         <dependencies>
           <dependency>
             <groupId>org.apache.maven.surefire</groupId>
             <artifactId>surefire-junit47</artifactId>
-            <version>2.13</version>
+            <version>${maven-surefire-plugin.version}</version>
           </dependency>
         </dependencies>
         <configuration>
diff --git a/interop/core/pom.xml b/interop/core/pom.xml
index 65b4c0d11..7e5a5b8d0 100644
--- a/interop/core/pom.xml
+++ b/interop/core/pom.xml
@@ -24,7 +24,7 @@
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-interop</artifactId>
 
diff --git a/jso/apis/pom.xml b/jso/apis/pom.xml
index f042dabdd..e140a3eda 100644
--- a/jso/apis/pom.xml
+++ b/jso/apis/pom.xml
@@ -21,7 +21,7 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-jso-apis</artifactId>
 
diff --git a/jso/core/pom.xml b/jso/core/pom.xml
index f407d8dcd..c37ca5504 100644
--- a/jso/core/pom.xml
+++ b/jso/core/pom.xml
@@ -21,7 +21,7 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-jso</artifactId>
 
diff --git a/jso/impl/pom.xml b/jso/impl/pom.xml
index c8ba6fb92..bfa796b69 100644
--- a/jso/impl/pom.xml
+++ b/jso/impl/pom.xml
@@ -21,7 +21,7 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xs
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-jso-impl</artifactId>
 
diff --git a/metaprogramming/api/pom.xml b/metaprogramming/api/pom.xml
index 68389bc3a..24da61afe 100644
--- a/metaprogramming/api/pom.xml
+++ b/metaprogramming/api/pom.xml
@@ -24,7 +24,7 @@
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-metaprogramming-api</artifactId>
 
diff --git a/pom.xml b/pom.xml
index a3278be96..cfc3f7475 100644
--- a/pom.xml
+++ b/pom.xml
@@ -65,19 +65,46 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <sonatypeOssDistMgmtSnapshotsUrl>https://oss.sonatype.org/content/repositories/snapshots/</sonatypeOssDistMgmtSnapshotsUrl>
+
     <html4j.version>1.5</html4j.version>
-    <jetty.version>9.4.38.v20210224</jetty.version>
     <slf4j.version>1.7.30</slf4j.version>
-    <jackson.version>2.12.2</jackson.version>
-    <idea.version>2018.2.8</idea.version>
     <asm.version>9.1</asm.version>
+
     <java.version>1.8</java.version>
     <java-tests.version>11</java-tests.version>
+
     <rhino.version>1.7.11</rhino.version>
-    <maven-compiler-plugin.version>3.8.0</maven-compiler-plugin.version>
+
     <testng.version>7.1.0</testng.version>
     <junit.version>4.13.2</junit.version>
+
     <commons-cli.version>1.4</commons-cli.version>
+    <commons-io.version>2.8.0</commons-io.version>
+
+    <jzlib.version>1.1.3</jzlib.version>
+    <joda-time.version>2.7</joda-time.version>
+    <hppc.version>0.7.3</hppc.version>
+
+    <jetty.version>9.4.38.v20210224</jetty.version>
+    <javax-websocket.version>1.0</javax-websocket.version>
+    <jackson.version>2.12.2</jackson.version>
+    <gson.version>2.8.6</gson.version>
+
+    <idea.version>2018.2.8</idea.version>
+
+    <maven-plugin-api.version>3.3.3</maven-plugin-api.version>
+    <maven-plugin-annotations.version>3.3</maven-plugin-annotations.version>
+
+    <maven-compiler-plugin.version>3.8.0</maven-compiler-plugin.version>
+    <maven-checkstyle-plugin.version>3.1.2</maven-checkstyle-plugin.version>
+    <maven-surefire-plugin.version>3.0.0-M5</maven-surefire-plugin.version>
+    <maven-source-plugin.version>3.2.1</maven-source-plugin.version>
+    <maven-javadoc-plugin.version>3.2.0</maven-javadoc-plugin.version>
+    <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
+    <maven-shade-plugin.version>3.2.4</maven-shade-plugin.version>
+    <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
+    <exec-maven-plugin.version>3.0.0</exec-maven-plugin.version>
+    <wagon-ftp.version>3.4.3</wagon-ftp.version>
 
     <teavm.test.incremental>false</teavm.test.incremental>
     <teavm.test.threads>1</teavm.test.threads>
@@ -136,7 +163,7 @@
       <dependency>
         <groupId>commons-io</groupId>
         <artifactId>commons-io</artifactId>
-        <version>2.4</version>
+        <version>${commons-io.version}</version>
       </dependency>
       <dependency>
         <groupId>org.ow2.asm</groupId>
@@ -151,27 +178,27 @@
       <dependency>
         <groupId>org.apache.maven</groupId>
         <artifactId>maven-plugin-api</artifactId>
-        <version>3.3.3</version>
+        <version>${maven-plugin-api.version}</version>
       </dependency>
       <dependency>
         <groupId>org.apache.maven.plugin-tools</groupId>
         <artifactId>maven-plugin-annotations</artifactId>
-        <version>3.3</version>
+        <version>${maven-plugin-annotations.version}</version>
       </dependency>
       <dependency>
         <groupId>org.apache.maven</groupId>
         <artifactId>maven-core</artifactId>
-        <version>3.3.3</version>
+        <version>${maven-plugin-api.version}</version>
       </dependency>
       <dependency>
         <groupId>org.apache.maven</groupId>
         <artifactId>maven-artifact</artifactId>
-        <version>3.3.3</version>
+        <version>${maven-plugin-api.version}</version>
       </dependency>
       <dependency>
         <groupId>javax.websocket</groupId>
         <artifactId>javax.websocket-api</artifactId>
-        <version>1.0</version>
+        <version>${javax-websocket.version}</version>
       </dependency>
       <dependency>
         <groupId>org.eclipse.jetty</groupId>
@@ -223,6 +250,26 @@
         <artifactId>commons-cli</artifactId>
         <version>${commons-cli.version}</version>
       </dependency>
+      <dependency>
+        <groupId>com.google.code.gson</groupId>
+        <artifactId>gson</artifactId>
+        <version>${gson.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>com.jcraft</groupId>
+        <artifactId>jzlib</artifactId>
+        <version>${jzlib.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>joda-time</groupId>
+        <artifactId>joda-time</artifactId>
+        <version>${joda-time.version}</version>
+      </dependency>
+      <dependency>
+        <groupId>com.carrotsearch</groupId>
+        <artifactId>hppc</artifactId>
+        <version>${hppc.version}</version>
+      </dependency>
     </dependencies>
   </dependencyManagement>
 
@@ -231,7 +278,7 @@
       <extension>
         <groupId>org.apache.maven.wagon</groupId>
         <artifactId>wagon-ftp</artifactId>
-        <version>3.4.3</version>
+        <version>${wagon-ftp.version}</version>
       </extension>
     </extensions>
     <pluginManagement>
@@ -248,7 +295,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-javadoc-plugin</artifactId>
-          <version>3.0.1</version>
+          <version>${maven-javadoc-plugin.version}</version>
           <executions>
             <execution>
               <id>build-javadoc</id>
@@ -270,7 +317,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-source-plugin</artifactId>
-          <version>3.0.1</version>
+          <version>${maven-source-plugin.version}</version>
           <executions>
             <execution>
               <id>attach-sources</id>
@@ -284,12 +331,12 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-surefire-plugin</artifactId>
-          <version>2.21.0</version>
+          <version>${maven-surefire-plugin.version}</version>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-checkstyle-plugin</artifactId>
-          <version>2.16</version>
+          <version>${maven-checkstyle-plugin.version}</version>
           <executions>
             <execution>
               <id>validate</id>
@@ -313,42 +360,23 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-jar-plugin</artifactId>
-          <version>3.0.2</version>
+          <version>${maven-jar-plugin.version}</version>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-shade-plugin</artifactId>
-          <version>3.1.1</version>
+          <version>${maven-shade-plugin.version}</version>
+        </plugin>
+        <plugin>
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>exec-maven-plugin</artifactId>
+          <version>${exec-maven-plugin.version}</version>
         </plugin>
       </plugins>
     </pluginManagement>
   </build>
 
   <profiles>
-    <profile>
-      <id>htmlUnit</id>
-      <activation>
-        <activeByDefault>true</activeByDefault>
-      </activation>
-
-      <build>
-        <pluginManagement>
-          <plugins>
-            <plugin>
-              <groupId>org.apache.maven.plugins</groupId>
-              <artifactId>maven-surefire-plugin</artifactId>
-              <version>2.16</version>
-              <configuration>
-                <systemProperties>
-                  <teavm.junit.js.runner>htmlunit</teavm.junit.js.runner>
-                </systemProperties>
-              </configuration>
-            </plugin>
-          </plugins>
-        </pluginManagement>
-      </build>
-    </profile>
-
     <profile>
       <id>with-samples</id>
       <activation>
@@ -397,7 +425,7 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-gpg-plugin</artifactId>
-            <version>1.4</version>
+            <version>${maven-gpg-plugin.version}</version>
             <executions>
               <execution>
                 <id>sign-artifacts</id>
diff --git a/tests/pom.xml b/tests/pom.xml
index 93f1d8d11..73b180091 100644
--- a/tests/pom.xml
+++ b/tests/pom.xml
@@ -73,7 +73,6 @@
     <dependency>
       <groupId>com.carrotsearch</groupId>
       <artifactId>hppc</artifactId>
-      <version>0.7.3</version>
       <scope>test</scope>
     </dependency>
     <dependency>
@@ -117,12 +116,11 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>2.16</version>
         <dependencies>
           <dependency>
             <groupId>org.apache.maven.surefire</groupId>
             <artifactId>surefire-junit47</artifactId>
-            <version>2.16</version>
+            <version>${maven-surefire-plugin.version}</version>
           </dependency>
         </dependencies>
         <configuration>
diff --git a/tools/c-incremental/pom.xml b/tools/c-incremental/pom.xml
index e5b2374da..986002ddb 100644
--- a/tools/c-incremental/pom.xml
+++ b/tools/c-incremental/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-c-incremental</artifactId>
 
@@ -47,7 +47,6 @@
     <dependency>
       <groupId>com.carrotsearch</groupId>
       <artifactId>hppc</artifactId>
-      <version>0.7.3</version>
       <optional>true</optional>
     </dependency>
     <dependency>
diff --git a/tools/chrome-rdp/pom.xml b/tools/chrome-rdp/pom.xml
index c466677fa..ceb25de37 100644
--- a/tools/chrome-rdp/pom.xml
+++ b/tools/chrome-rdp/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-chrome-rdp</artifactId>
 
diff --git a/tools/classlib-comparison-gen/pom.xml b/tools/classlib-comparison-gen/pom.xml
index 748bc844c..d7eaa870d 100644
--- a/tools/classlib-comparison-gen/pom.xml
+++ b/tools/classlib-comparison-gen/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-classlib-comparison-gen</artifactId>
 
diff --git a/tools/cli/pom.xml b/tools/cli/pom.xml
index d1a51af7a..7a2f556bd 100644
--- a/tools/cli/pom.xml
+++ b/tools/cli/pom.xml
@@ -91,7 +91,6 @@
     <dependency>
       <groupId>com.carrotsearch</groupId>
       <artifactId>hppc</artifactId>
-      <version>0.7.3</version>
       <optional>true</optional>
     </dependency>
     <dependency>
diff --git a/tools/core/pom.xml b/tools/core/pom.xml
index cefbf1bc1..d85bc5819 100644
--- a/tools/core/pom.xml
+++ b/tools/core/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-tooling</artifactId>
 
diff --git a/tools/devserver/pom.xml b/tools/devserver/pom.xml
index 1cfadf889..67d1182b4 100644
--- a/tools/devserver/pom.xml
+++ b/tools/devserver/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-devserver</artifactId>
 
diff --git a/tools/idea/idea-artifacts/pom.xml b/tools/idea/idea-artifacts/pom.xml
index a09b3991d..592857f7f 100644
--- a/tools/idea/idea-artifacts/pom.xml
+++ b/tools/idea/idea-artifacts/pom.xml
@@ -42,7 +42,6 @@
           <plugin>
             <groupId>org.codehaus.mojo</groupId>
             <artifactId>exec-maven-plugin</artifactId>
-            <version>1.3.2</version>
             <executions>
               <execution>
                 <id>copy-dependencies</id>
diff --git a/tools/maven/pom.xml b/tools/maven/pom.xml
index 52be36183..161fcb831 100644
--- a/tools/maven/pom.xml
+++ b/tools/maven/pom.xml
@@ -21,7 +21,7 @@
     <groupId>org.teavm</groupId>
     <artifactId>teavm</artifactId>
     <version>0.7.0-SNAPSHOT</version>
-    <relativePath>../..</relativePath>
+    <relativePath>../../pom.xml</relativePath>
   </parent>
   <artifactId>teavm-maven</artifactId>