diff --git a/uhabits-android/build.gradle.kts b/uhabits-android/build.gradle.kts
index 0251a8351..2849d9df7 100644
--- a/uhabits-android/build.gradle.kts
+++ b/uhabits-android/build.gradle.kts
@@ -87,7 +87,7 @@ android {
 
 dependencies {
     val daggerVersion = "2.41"
-    val kotlinVersion = "1.6.10"
+    val kotlinVersion = "1.6.21"
     val kxCoroutinesVersion = "1.6.1"
     val ktorVersion = "1.6.8"
     val espressoVersion = "3.4.0"
diff --git a/uhabits-server/build.gradle.kts b/uhabits-server/build.gradle.kts
index 19834ad81..c41221430 100644
--- a/uhabits-server/build.gradle.kts
+++ b/uhabits-server/build.gradle.kts
@@ -34,7 +34,7 @@ application {
 
 dependencies {
     val ktorVersion = "1.6.8"
-    val kotlinVersion = "1.6.10"
+    val kotlinVersion = "1.6.21"
     val logbackVersion = "1.2.11"
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlinVersion")
     implementation("io.ktor:ktor-server-netty:$ktorVersion")