diff --git a/classlib/src/main/java/org/teavm/classlib/impl/tz/TimeZoneGenerator.java b/classlib/src/main/java/org/teavm/classlib/impl/tz/TimeZoneGenerator.java
index 4dca03ad1..4656d476f 100644
--- a/classlib/src/main/java/org/teavm/classlib/impl/tz/TimeZoneGenerator.java
+++ b/classlib/src/main/java/org/teavm/classlib/impl/tz/TimeZoneGenerator.java
@@ -30,7 +30,7 @@ import org.teavm.platform.metadata.MetadataGeneratorContext;
 import org.teavm.platform.metadata.ResourceMap;
 
 public class TimeZoneGenerator implements MetadataGenerator {
-    public static final String TIMEZONE_DB_VERSION = "2019b";
+    public static final String TIMEZONE_DB_VERSION = "2021a";
     public static final String TIMEZONE_DB_PATH = "org/teavm/classlib/impl/tz/tzdata" + TIMEZONE_DB_VERSION + ".zip";
 
     public static void compile(ZoneInfoCompiler compiler, ClassLoader classLoader) {
diff --git a/classlib/src/main/resources/org/teavm/classlib/impl/tz/tzdata2019b.zip b/classlib/src/main/resources/org/teavm/classlib/impl/tz/tzdata2019b.zip
deleted file mode 100644
index 743bace3d..000000000
Binary files a/classlib/src/main/resources/org/teavm/classlib/impl/tz/tzdata2019b.zip and /dev/null differ
diff --git a/classlib/src/main/resources/org/teavm/classlib/impl/tz/tzdata2021a.zip b/classlib/src/main/resources/org/teavm/classlib/impl/tz/tzdata2021a.zip
new file mode 100644
index 000000000..87eee8409
Binary files /dev/null and b/classlib/src/main/resources/org/teavm/classlib/impl/tz/tzdata2021a.zip differ