diff --git a/Dockerfile b/Dockerfile
index 33fbfbb..cf18aca 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -196,7 +196,8 @@ RUN apt-install-angie-mod.sh \
       zip \
       zstd \
     ; \
-    apt-clean.sh
+    apt-clean.sh ; \
+    jdupes -1LSpr /usr/
 
 ## adjust permissions/ownership
 RUN d='/etc/angie' ; \
diff --git a/Dockerfile.base b/Dockerfile.base
index 7faa62a..ce5c8ee 100644
--- a/Dockerfile.base
+++ b/Dockerfile.base
@@ -54,6 +54,7 @@ RUN apt-env.sh apt-get update ; \
     apt-env.sh apt-get upgrade -y ; \
     apt-install.sh \
       cron \
+      jdupes \
       logrotate \
       netbase \
       openssl \
@@ -242,7 +243,8 @@ RUN certifi_pem="${PYTHON_SITE_PACKAGES}/pip/_vendor/certifi/cacert.pem" ; \
 
 RUN find /usr/local/sbin/ ! -type d -ls -delete ; \
     find /run/ -mindepth 1 -ls -delete || : ; \
-    install -d -m 01777 /run/lock
+    install -d -m 01777 /run/lock ; \
+    jdupes -1LSpr /usr/
 
 ## ---
 
diff --git a/Dockerfile.deps b/Dockerfile.deps
index 9ce4ee9..0f3d02f 100644
--- a/Dockerfile.deps
+++ b/Dockerfile.deps
@@ -86,4 +86,5 @@ RUN apt-install.sh \
     ; \
     apt-clean.sh
 
-RUN find /usr/local/sbin/ ! -type d -ls -delete
+RUN find /usr/local/sbin/ ! -type d -ls -delete ; \
+    jdupes -1LSpr /usr/