diff --git a/Dockerfile b/Dockerfile
index fe4e0bc..152cdf9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,13 +1,15 @@
-FROM debian:bullseye-slim
+FROM debian:bullseye-slim@sha256:34b63f55a4b193ad03c5ddb4b3f8546c797763ed708f0df5309ecb9507d15179
 
 RUN adduser --disabled-password --gecos "" --no-create-home --uid 1000 cronos
 
 RUN mkdir -p /home/cronos/data && mkdir -p /home/cronos/config
 RUN apt-get update -y && apt-get install wget curl procps net-tools jq lz4 -y
-RUN cd /tmp && wget --no-check-certificate https://github.com/crypto-org-chain/cronos/releases/download/v0.8.1/cronos_0.8.1_Linux_x86_64.tar.gz && tar -xvf cronos_0.8.1_Linux_x86_64.tar.gz \
-    && rm cronos_0.8.1_Linux_x86_64.tar.gz && mv ./* /home/cronos/
+
+RUN cd /home/cronos && wget --no-check-certificate https://github.com/crypto-org-chain/cronos/releases/download/v1.4.8/cronos_1.4.8-testnet_Linux_x86_64.tar.gz && tar -xvf cronos_1.4.8-testnet_Linux_x86_64.tar.gz \
+    && rm cronos_1.4.8-testnet_Linux_x86_64.tar.gz
+
 RUN chown -R cronos:cronos /home/cronos
 
 USER cronos
 
-ENTRYPOINT ["/home/cronos/bin/cronosd"]
\ No newline at end of file
+ENTRYPOINT ["/home/cronos/bin/cronosd"]