diff --git a/uhabits-android/build.gradle.kts b/uhabits-android/build.gradle.kts
index b76190029..85e192c36 100644
--- a/uhabits-android/build.gradle.kts
+++ b/uhabits-android/build.gradle.kts
@@ -89,7 +89,7 @@ android {
 
 dependencies {
     val daggerVersion = "2.37"
-    val kotlinVersion = "1.5.20"
+    val kotlinVersion = "1.5.21"
     val kxCoroutinesVersion = "1.5.1"
     val ktorVersion = "1.6.2"
     val espressoVersion = "3.4.0"
diff --git a/uhabits-server/build.gradle.kts b/uhabits-server/build.gradle.kts
index 50e5f4245..98f0b381a 100644
--- a/uhabits-server/build.gradle.kts
+++ b/uhabits-server/build.gradle.kts
@@ -34,7 +34,7 @@ application {
 
 dependencies {
     val ktorVersion = "1.6.2"
-    val kotlinVersion = "1.5.20"
+    val kotlinVersion = "1.5.21"
     val logbackVersion = "1.2.3"
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlinVersion")
     implementation("io.ktor:ktor-server-netty:$ktorVersion")