diff --git a/kotlin/Dockerfile b/kotlin/Dockerfile
index f54eecb..2821243 100644
--- a/kotlin/Dockerfile
+++ b/kotlin/Dockerfile
@@ -1,6 +1,6 @@
 FROM git.luke-else.co.uk/luke-else/base:latest
 
-RUN apk add --no-cache unzip openjdk21
+RUN apk add --no-cache unzip zip openjdk21
 
 # Set Java environment variables
 ENV JAVA_HOME=/usr/lib/jvm/java-21-openjdk