diff --git a/build.gradle.kts b/build.gradle.kts
index 66d5e23e03..98dbb3cc0b 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -206,6 +206,7 @@ tasks {
         group = "openosrs"
 
         classpath = project(":runelite-client").sourceSets.main.get().runtimeClasspath
+        enableAssertions = true
     }
 
     named<DependencyUpdatesTask>("dependencyUpdates") {
diff --git a/runelite-client/runelite-client.gradle.kts b/runelite-client/runelite-client.gradle.kts
index 949bcc9934..cfe146ffe5 100644
--- a/runelite-client/runelite-client.gradle.kts
+++ b/runelite-client/runelite-client.gradle.kts
@@ -162,6 +162,7 @@ tasks {
         group = "openosrs"
 
         classpath = project.sourceSets.main.get().runtimeClasspath
+        enableAssertions = true
         main = "net.runelite.client.RuneLite"
     }
 }