diff --git a/ci/docker/Dockerfile.build.ubuntu_gpu_tensorrt b/ci/docker/Dockerfile.build.ubuntu_gpu_tensorrt
index f5f90c4e9d51..09591ee0b9c9 100644
--- a/ci/docker/Dockerfile.build.ubuntu_gpu_tensorrt
+++ b/ci/docker/Dockerfile.build.ubuntu_gpu_tensorrt
@@ -35,7 +35,7 @@ ARG USER_ID=0
 COPY install/ubuntu_adduser.sh /work/
 RUN /work/ubuntu_adduser.sh
 
-ENV CUDNN_VERSION=7.6.0.64
+ENV CUDNN_VERSION=7.5.0.56
 COPY install/ubuntu_cudnn.sh /work/
 RUN /work/ubuntu_cudnn.sh