diff --git a/test/client/Dockerfile b/test/client/Dockerfile
index 72581c3..9ffc147 100644
--- a/test/client/Dockerfile
+++ b/test/client/Dockerfile
@@ -1,7 +1,7 @@
 FROM debian:stable-slim
 
 RUN apt-get update && \
-    apt-get -y install --no-install-recommends openssh-client netcat && \
+    apt-get -y install --no-install-recommends openssh-client netcat-openbsd && \
     rm -rf /var/lib/apt/lists/* && \
     adduser --system clientuser
 
diff --git a/test/destination/Dockerfile b/test/destination/Dockerfile
index 66a035d..412bf78 100644
--- a/test/destination/Dockerfile
+++ b/test/destination/Dockerfile
@@ -1,7 +1,7 @@
 FROM debian:stable-slim
 
 RUN apt-get update && \
-    apt-get -y install --no-install-recommends netcat && \
+    apt-get -y install --no-install-recommends netcat-openbsd && \
     rm -rf /var/lib/apt/lists/*
 
 COPY entrypoint.sh /