diff --git a/powershell/Dockerfile b/powershell/Dockerfile
index a73c4dd..fa0ede4 100644
--- a/powershell/Dockerfile
+++ b/powershell/Dockerfile
@@ -1,7 +1,7 @@
 FROM ubuntu:16.04
 LABEL maintainer "Christian Koep <christiankoep@gmail.com>"
 
-ENV POWERSHELL_VERSION 6.0.0-beta.3
+ENV POWERSHELL_VERSION 6.0.0-beta.4
 
 RUN apt-get update && apt-get install -y \
 	ca-certificates \
diff --git a/tarsnap/Dockerfile b/tarsnap/Dockerfile
index e1f6e01..9284a7c 100644
--- a/tarsnap/Dockerfile
+++ b/tarsnap/Dockerfile
@@ -6,7 +6,7 @@ RUN apk add --no-cache \
 	gnupg \
 	&& rm -rf /var/lib/apt/lists/*
 
-ENV TARSNAP_VERSION 1.0.37
+ENV TARSNAP_VERSION 1.0.38
 
 RUN set -x \
 	&& apk add --no-cache --virtual .build-deps \