diff --git a/app/build.gradle b/app/build.gradle
index 36d07e9a1..5cb514f90 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -14,7 +14,7 @@ plugins {
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(17)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }
 
diff --git a/e2e/build.gradle b/e2e/build.gradle
index 238087eae..27dd92ddb 100644
--- a/e2e/build.gradle
+++ b/e2e/build.gradle
@@ -5,7 +5,7 @@ plugins {
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(17)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }
 
diff --git a/etor/build.gradle b/etor/build.gradle
index 02a3350a1..c5168f15f 100644
--- a/etor/build.gradle
+++ b/etor/build.gradle
@@ -5,7 +5,7 @@ plugins {
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(17)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }
 
diff --git a/rs-e2e/build.gradle b/rs-e2e/build.gradle
index d5c248b3a..8bf7b6396 100644
--- a/rs-e2e/build.gradle
+++ b/rs-e2e/build.gradle
@@ -5,7 +5,7 @@ plugins {
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(17)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }
 
diff --git a/shared/build.gradle b/shared/build.gradle
index e861f39de..82c2f69c7 100644
--- a/shared/build.gradle
+++ b/shared/build.gradle
@@ -6,7 +6,7 @@ plugins {
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(17)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }