diff --git a/examples/streamlit/Dockerfile b/examples/streamlit/Dockerfile
index c9866a8..00c40c6 100644
--- a/examples/streamlit/Dockerfile
+++ b/examples/streamlit/Dockerfile
@@ -11,7 +11,10 @@ WORKDIR $HOME/app
 RUN apt-get update && apt-get install --no-install-recommends -y \
     build-essential \
     software-properties-common \ 
-    curl
+    curl \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
 
 COPY requirements.txt requirements.txt
 COPY app.py app.py
diff --git a/serve-encrypt/Dockerfile b/serve-encrypt/Dockerfile
index a3a6429..736e9bf 100644
--- a/serve-encrypt/Dockerfile
+++ b/serve-encrypt/Dockerfile
@@ -1,16 +1,18 @@
 # Use an official Debian as a parent image for a lightweight build
 FROM debian:stable-slim
 
-# Install PostgreSQL client and GPG
-RUN apt-get update && apt-get install --no-install-recommends -y gnupg2 curl postgresql-client && apt-get clean && rm -rf /var/lib/apt/lists/*
+# Set the GNUPGHOME environment variable
+ENV GNUPGHOME=/home/pguser/.gnupg
 
+# Install PostgreSQL client and GPG
 # Create a non-root user and group (using user ID 1000 and group ID 1000 for compatibility)
 # Fixed commands for Debian
-RUN groupadd -g 1000 pguser && \
-    useradd -m -u 1000 -g pguser pguser
-
-# Set the GNUPGHOME environment variable
-ENV GNUPGHOME=/home/pguser/.gnupg
+RUN apt-get update \
+	&& apt-get install --no-install-recommends -y gnupg2 curl postgresql-client  \
+	&& apt-get clean \
+	&& rm -rf /var/lib/apt/lists/* \
+	&& groupadd -g 1000 pguser \
+	&& useradd -m -u 1000 -g pguser pguser
 
 # Set working directory
 WORKDIR /home/pguser
diff --git a/serve-filemanager/Dockerfile b/serve-filemanager/Dockerfile
index 308b84e..c921922 100644
--- a/serve-filemanager/Dockerfile
+++ b/serve-filemanager/Dockerfile
@@ -7,9 +7,9 @@ COPY filebrowser.json /.filebrowser.json
 
 COPY startup.sh /usr/local/bin/startup.sh
 RUN apk add --update --no-cache \
-    wget \
-    zip \
-    unzip \
+    wget=1.21.4 \
+    zip=3.0-r12 \
+    unzip=6.0-r14 \
     && adduser -D -u 1000 -g 1000 -h $HOME $USER \
     && chmod +x /usr/local/bin/startup.sh \
     && rm -rf /var/lib/apt/lists/*