diff --git a/build.gradle.kts b/build.gradle.kts
index 415b1617..0d9ba0a3 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -35,7 +35,7 @@ dependencies {
       implementation(it) {
         version {
           strictly("[1.5,1.9)")
-          prefer("1.8.20")
+          prefer("1.8.21")
         }
       }
     }
@@ -63,7 +63,7 @@ dependencies {
     }
   }
   implementation("org.jetbrains.kotlin:kotlin-stdlib:1.8.21")
-  implementation("org.jetbrains.kotlin:kotlin-reflect:1.8.20")
+  implementation("org.jetbrains.kotlin:kotlin-reflect:1.8.21")
 
   implementation("io.github.microutils:kotlin-logging:3.0.5")
   implementation("org.slf4j:slf4j-api:2.0.7")