diff --git a/build.sh b/build.sh
index 2ac9e3d..6be01dc 100644
--- a/build.sh
+++ b/build.sh
@@ -103,8 +103,8 @@ build_pyside() {
         latest_tag="$(from-toml-dict "$cfg" "$build.settings" | get-value-of TAG | pass-argument VERSION "${major}-latest")"
         build_args="$(from-toml-dict "$cfg" "$build.docker-args" | to-docker-args "$repo" "$version")"
         box-green "Building image $repo:$tag..."
-        echo "> docker build -t $repo:$tag $build_args --build-arg PYSIDE_VERSION=$version $directory/${build}"
-        docker build -t "$repo:$tag" $build_args --build-arg PYSIDE_VERSION="$version" "$directory/${build}"
+        echo "> docker build -t $repo:$tag $build_args $directory/${build}"
+        docker build -t "$repo:$tag" $build_args "$directory/${build}"
         # Tag as latest
         if [ "$latest" != "false" ]; then
             docker tag "$repo:$tag" "$repo:$latest_tag"
diff --git a/pyside2/linux/Dockerfile b/pyside2/linux/Dockerfile
index 5d35c10..f35432b 100644
--- a/pyside2/linux/Dockerfile
+++ b/pyside2/linux/Dockerfile
@@ -14,7 +14,7 @@ FROM ubuntu:jammy
 # Jammy uses python3.10 and not 3.12, which is not compatible with PySide2.
 
 ARG DEBIAN_FRONTEND=noninteractive
-ARG PYSIDE_VERSION
+ARG PYSIDE_VERSION=5.15.2.1
 
 ENV TZ=Europe/Paris 
 RUN apt-get update
diff --git a/pyside2/wine/Dockerfile b/pyside2/wine/Dockerfile
index aa31bd2..d8ceaf1 100644
--- a/pyside2/wine/Dockerfile
+++ b/pyside2/wine/Dockerfile
@@ -12,7 +12,7 @@
 
 FROM ubuntu:noble
 
-ARG PYSIDE_VERSION
+ARG PYSIDE_VERSION=5.15.2.1
 
 # Adapted from https://github.com/cdrx/docker-pyinstaller/blob/master/Dockerfile-py3-win64
 # Upstream hasn't been updated for a while.
diff --git a/pyside6/config.toml b/pyside6/config.toml
index aae9be6..0e123ec 100644
--- a/pyside6/config.toml
+++ b/pyside6/config.toml
@@ -11,7 +11,7 @@
 # 
 
 MAJOR_VERSION="6"
-PYSIDE_VERSION="6.7.3"
+PYSIDE_VERSION="6.7.2"
 BUILDS="linux wine linux-latex"
 
 [linux.settings]
diff --git a/pyside6/linux/Dockerfile b/pyside6/linux/Dockerfile
index 37bef04..f7446ad 100644
--- a/pyside6/linux/Dockerfile
+++ b/pyside6/linux/Dockerfile
@@ -12,7 +12,7 @@
 FROM ubuntu:noble
 
 ARG DEBIAN_FRONTEND=noninteractive
-ARG PYSIDE_VERSION
+ARG PYSIDE_VERSION=6.7.2
 
 ENV TZ=Europe/Paris
 RUN apt-get update
diff --git a/pyside6/wine/Dockerfile b/pyside6/wine/Dockerfile
index a5fe7c8..03e84c0 100644
--- a/pyside6/wine/Dockerfile
+++ b/pyside6/wine/Dockerfile
@@ -12,7 +12,7 @@
 
 FROM ubuntu:noble
 
-ARG PYSIDE_VERSION
+ARG PYSIDE_VERSION=6.7.2
 
 # Adapted from https://github.com/cdrx/docker-pyinstaller/blob/master/Dockerfile-py3-win64
 # Upstream hasn't been updated for a while.