diff --git a/docker/mistral/mistral-base/Dockerfile.j2 b/docker/mistral/mistral-base/Dockerfile.j2
index 22bcd647cb..d2f608f59b 100644
--- a/docker/mistral/mistral-base/Dockerfile.j2
+++ b/docker/mistral/mistral-base/Dockerfile.j2
@@ -41,7 +41,7 @@ ADD plugins-archive /
 ] %}
 
 RUN ln -s mistral-base-source/* mistral \
-    && {{ macros.install_pip(mistral_base_pip_packages | customizable("pip_packages"), constraints = false) }} \
+    && {{ macros.install_pip(mistral_base_pip_packages | customizable("pip_packages")) }} \
     && mkdir -p /etc/mistral \
     && cp -r /mistral/etc/* /etc/mistral/ \
     && chown -R mistral: /etc/mistral \
diff --git a/releasenotes/notes/mistral-respect-uc-77aea99b5c6506ba.yaml b/releasenotes/notes/mistral-respect-uc-77aea99b5c6506ba.yaml
new file mode 100644
index 0000000000..5fe31d462d
--- /dev/null
+++ b/releasenotes/notes/mistral-respect-uc-77aea99b5c6506ba.yaml
@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    Fixes Mistral source images to respect upper-constraints.