diff --git a/Dockerfile b/Dockerfile
index 83057b0..7788e1e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,12 +5,20 @@ FROM nestybox/ubuntu-focal-systemd-docker
 RUN apt update && \
     apt install -y wget gnupg2 software-properties-common unzip
 
-# Download deb files
-RUN wget https://github.com/ranchimall/blockbook-docker/archive/main.zip && unzip main.zip
-RUN cd blockbook-docker-main && sudo apt install -y ./dind_backend-flo_0.15.1.1-satoshilabs-1_amd64.deb && sudo apt install -y ./dind_blockbook-flo_0.4.0_amd64.deb
+# Download deb files based on the TESTNET environment variable
+ARG TESTNET=false
+
+# If TESTNET is true, download testnet deb files; otherwise, download mainnet deb files
+RUN if [ "$TESTNET" = "true" ]; then \
+        wget https://github.com/ranchimall/blockbook-docker/archive/testnet.zip && unzip testnet.zip && \
+        cd blockbook-docker-testnet && sudo apt install -y ./dind_backend-flo_0.15.1.1-satoshilabs-1_amd64.deb && sudo apt install -y ./dind_blockbook-flo_0.4.0_amd64.deb; \
+    else \
+        wget https://github.com/ranchimall/blockbook-docker/archive/main.zip && unzip main.zip && \
+        cd blockbook-docker-main && sudo apt install -y ./dind_backend-flo_0.15.1.1-satoshilabs-1_amd64.deb && sudo apt install -y ./dind_blockbook-flo_0.4.0_amd64.deb; \
+    fi
 
 # Expose ports
 EXPOSE 22 80 9166
 
 # Start your applications (Uncomment and replace with your application start commands)
-CMD ["/lib/systemd/systemd"]
\ No newline at end of file
+CMD ["/lib/systemd/systemd"]