diff --git a/devops/Dockerfile b/devops/Dockerfile
index b30f7b5..ef6c417 100644
--- a/devops/Dockerfile
+++ b/devops/Dockerfile
@@ -38,23 +38,26 @@ RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
     && npm install -g npm@latest
 
 # --- Install act (GitHub Actions local runner) ---
-RUN curl -s https://api.github.com/repos/nektos/act/releases/latest \
-    |  grep "browser_download_url.*linux-amd64.*tar.gz" \
+RUN mkdir /tmp/act \
+    && curl -s https://api.github.com/repos/nektos/act/releases/latest \
+    | grep "browser_download_url.*act_Linux_x86_64.tar.gz" \
     | cut -d '"' -f 4 \
-    | wget -O /usr/local/bin/act -i - \
-    && chmod +x /usr/local/bin/act
+    | wget -O /tmp/act/act.tar.gz -i - \
+    && tar -xzf /tmp/act/act.tar.gz -C /tmp/act \
+    && install -m 0755 /tmp/act/act /usr/local/bin/act \
+    && rm -r /tmp/act 
 
 # -- install chroma for zsh
-RUN curl -s https://api.github.com/repos/alecthomas/chroma/releases/latest \
+RUN mkdir /tmp/chroma \
+    && curl -s https://api.github.com/repos/alecthomas/chroma/releases/latest \
     | grep "browser_download_url.*linux-amd64.*tar.gz" \
     | cut -d '"' -f 4 \
-    | wget -O /tmp/chroma.tar.gz -i - \
-    && tar -xzf /tmp/chroma.tar.gz -C /usr/local/bin \
-    && chmod +x /usr/local/bin/chroma
+    | wget -O /tmp/chroma/chroma.tar.gz -i - \
+    && tar -xzf /tmp/chroma/chroma.tar.gz -C /tmp/chroma \
+    && install -m 0755 /tmp/chroma/chroma /usr/local/bin/chroma \ 
+    && rm -r /tmp/chroma 
 
-
-
-# --- set zsh shell ---
+# --- set zsh shell as default ---
 RUN chsh -s /usr/bin/zsh vscode
 
 RUN git clone https://github.com/zdharma-continuum/fast-syntax-highlighting.git /home/vscode/.oh-my-zsh/custom/plugins/fast-syntax-highlighting