diff --git a/envoy/Dockerfile b/envoy/Dockerfile
index e0e96c9..34f49f3 100644
--- a/envoy/Dockerfile
+++ b/envoy/Dockerfile
@@ -1,6 +1,6 @@
 # for decoding envoy critical exceptions - use image with debug symbols
 # paskalmaksim/envoy-docker-image:debug-base
-ARG base=envoyproxy/envoy:v1.26.2
+ARG base=envoyproxy/envoy:v1.26.6
 
 FROM $base
 ARG TARGETARCH
diff --git a/utils/envoy-debug/Dockerfile b/utils/envoy-debug/Dockerfile
index 749384a..f9d8acd 100644
--- a/utils/envoy-debug/Dockerfile
+++ b/utils/envoy-debug/Dockerfile
@@ -1,7 +1,8 @@
-FROM envoyproxy/envoy-debug:v1.26.2
+FROM envoyproxy/envoy-debug:v1.26.6
 
 ADD https://raw.githubusercontent.com/envoyproxy/envoy/master/tools/stack_decode.py /stack_decode.py
 
 RUN apt update \
 && apt install -y python3 binutils gdb \
-&& chmod 777 /stack_decode.py
\ No newline at end of file
+&& chmod 777 /stack_decode.py \
+&& rm -rf /var/lib/apt/lists/* /var/cache/apt/archives/*
\ No newline at end of file