diff --git a/attachment-viewer/build.gradle b/attachment-viewer/build.gradle
index e9ddefb62c..7705f72b58 100644
--- a/attachment-viewer/build.gradle
+++ b/attachment-viewer/build.gradle
@@ -37,7 +37,7 @@ android {
         targetCompatibility versions.targetCompat
     }
     kotlinOptions {
-        jvmTarget = '1.8'
+        jvmTarget = '11'
     }
 
     buildFeatures {
diff --git a/diff-match-patch/build.gradle b/diff-match-patch/build.gradle
index 82292e24db..f623c57a49 100644
--- a/diff-match-patch/build.gradle
+++ b/diff-match-patch/build.gradle
@@ -3,6 +3,3 @@ apply plugin: 'java-library'
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
 }
-
-sourceCompatibility = "8"
-targetCompatibility = "8"
diff --git a/library/ui-styles/build.gradle b/library/ui-styles/build.gradle
index abab4e65ad..91b479c49a 100644
--- a/library/ui-styles/build.gradle
+++ b/library/ui-styles/build.gradle
@@ -41,7 +41,7 @@ android {
         targetCompatibility versions.targetCompat
     }
     kotlinOptions {
-        jvmTarget = '1.8'
+        jvmTarget = '11'
     }
     buildFeatures {
         viewBinding true
diff --git a/matrix-sdk-android-rx/build.gradle b/matrix-sdk-android-rx/build.gradle
index 437f304b0b..dbd761cee3 100644
--- a/matrix-sdk-android-rx/build.gradle
+++ b/matrix-sdk-android-rx/build.gradle
@@ -27,7 +27,7 @@ android {
     }
 
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = "11"
     }
 }
 
diff --git a/matrix-sdk-android/build.gradle b/matrix-sdk-android/build.gradle
index f15746f73c..9674bdd372 100644
--- a/matrix-sdk-android/build.gradle
+++ b/matrix-sdk-android/build.gradle
@@ -72,7 +72,7 @@ android {
     }
 
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = "11"
     }
 
     sourceSets {
diff --git a/vector/build.gradle b/vector/build.gradle
index 8b4075f77b..f185df9ae4 100644
--- a/vector/build.gradle
+++ b/vector/build.gradle
@@ -296,7 +296,7 @@ android {
     }
 
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = "11"
         freeCompilerArgs += [
                 "-Xopt-in=kotlin.RequiresOptIn",
                 // Fixes false positive "This is an internal Mavericks API. It is not intended for external use."