diff --git a/docker/Dockerfile_txsim b/docker/Dockerfile_txsim
index d306eb2341..9a81e7b65e 100644
--- a/docker/Dockerfile_txsim
+++ b/docker/Dockerfile_txsim
@@ -23,7 +23,7 @@ RUN uname -a &&\
     make build && make txsim-build
 
 # Stage 2: create a minimal image with the binary
-FROM docker.io/alpine:3.18.4
+FROM docker.io/alpine:3.18.5
 
 # Use UID 10,001 because UIDs below 10,000 are a security risk.
 # Ref: https://github.com/hexops/dockerfile/blob/main/README.md#do-not-use-a-uid-below-10000