diff --git a/build.gradle.kts b/build.gradle.kts
index cae8f199..9d04b60e 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -33,7 +33,7 @@ dependencies {
     ).onEach {
       implementation(it) {
         version {
-          strictly("[1.4,1.7)")
+          strictly("[1.6,1.7)")
           prefer("1.6.21")
         }
       }
@@ -71,7 +71,7 @@ dependencies {
 }
 
 val dependencyVersions = listOf(
-  "org.jetbrains.kotlin:kotlin-stdlib:1.6.20",
+  "org.jetbrains.kotlin:kotlin-stdlib:1.6.21",
   "org.jetbrains.kotlin:kotlin-stdlib-common:1.6.21",
   "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.1",
   "org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.6.1",