diff --git a/docker/Dockerfile.slim b/docker/Dockerfile.slim
index 798e76b14a2ee315a25fe71d5a0e4f9c877d8630..3b980e3df0785f28de7c1d636da112bc5df382a3 100644
--- a/docker/Dockerfile.slim
+++ b/docker/Dockerfile.slim
@@ -148,7 +148,7 @@ RUN apt-get install --assume-yes --no-install-recommends --option=debug::pkgProb
 		python3 \
 		python3-pip
 RUN pip3 install \
-		cmake
+		cmake==3.31.6
 
 # Install packages requried by kvmtool.
 RUN apt-get install --assume-yes --no-install-recommends --option=debug::pkgProblemResolver=yes \