diff --git a/Linux/CPPBuilder/Dockerfile b/Linux/CPPBuilder/Dockerfile
index 6aaa3f1..496d910 100644
--- a/Linux/CPPBuilder/Dockerfile
+++ b/Linux/CPPBuilder/Dockerfile
@@ -29,19 +29,19 @@ RUN apt-get update && apt-get install -y \
     # Install LLVM 21
     && wget https://apt.llvm.org/llvm.sh -O /tmp/llvm.sh \
     && chmod +x /tmp/llvm.sh \
-    && /tmp/llvm.sh 21 all \
+    && /tmp/llvm.sh 20 all \
     \
     # Symlinks for clang 21 tools
-    && ln -sf /usr/bin/clang-21 /usr/bin/clang \
-    && ln -sf /usr/bin/clang++-21 /usr/bin/clang++ \
-    && ln -sf /usr/bin/llvm-profdata-21 /usr/bin/llvm-profdata \
-    && ln -sf /usr/bin/llvm-cov-21 /usr/bin/llvm-cov \
-    && ln -sf /usr/bin/clang-format-21 /usr/bin/clang-format \
-    && ln -sf /usr/bin/clang-tidy-21 /usr/bin/clang-tidy \
-    && ln -sf /usr/bin/run-clang-tidy-21 /usr/bin/run-clang-tidy \
-    && ln -sf /usr/bin/llvm-ar-21 /usr/bin/llvm-ar \
-    && ln -sf /usr/bin/llvm-nm-21 /usr/bin/llvm-nm \
-    && ln -sf /usr/bin/llvm-ranlib-21 /usr/bin/llvm-ranlib \
+    && ln -sf /usr/bin/clang-20 /usr/bin/clang \
+    && ln -sf /usr/bin/clang++-20 /usr/bin/clang++ \
+    && ln -sf /usr/bin/llvm-profdata-20 /usr/bin/llvm-profdata \
+    && ln -sf /usr/bin/llvm-cov-20 /usr/bin/llvm-cov \
+    && ln -sf /usr/bin/clang-format-20 /usr/bin/clang-format \
+    && ln -sf /usr/bin/clang-tidy-20 /usr/bin/clang-tidy \
+    && ln -sf /usr/bin/run-clang-tidy-20 /usr/bin/run-clang-tidy \
+    && ln -sf /usr/bin/llvm-ar-20 /usr/bin/llvm-ar \
+    && ln -sf /usr/bin/llvm-nm-20 /usr/bin/llvm-nm \
+    && ln -sf /usr/bin/llvm-ranlib-20 /usr/bin/llvm-ranlib \
     \
     # Reset ccache stats
     && ccache --zero-stats