diff --git a/Dockerfile b/Dockerfile
index 9da59a0..3bc2638 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -47,6 +47,7 @@ COPY --from=busybox-min /busybox/busybox /busybox/busybox
 # Add config-merge
 COPY --from=config-merge /usr/local/config-merge /usr/local/config-merge
 COPY --from=config-merge /usr/local/bin/config-merge /usr/local/bin/config-merge
+COPY --from=config-merge /usr/local/bin/envsubst /usr/local/bin/envsubst
 
 # Add dasel
 RUN if [ "$(uname -m)" = "aarch64" ]; then \
diff --git a/native.Dockerfile b/native.Dockerfile
index 39aa0b1..f8eedd6 100644
--- a/native.Dockerfile
+++ b/native.Dockerfile
@@ -22,6 +22,7 @@ COPY --from=busybox-min /busybox/busybox /busybox/busybox
 # Add config-merge
 COPY --from=config-merge /usr/local/config-merge /usr/local/config-merge
 COPY --from=config-merge /usr/local/bin/config-merge /usr/local/bin/config-merge
+COPY --from=config-merge /usr/local/bin/envsubst /usr/local/bin/envsubst
 
 # Add dasel
 RUN if [ "$(uname -m)" = "aarch64" ]; then \