diff --git a/CHANGELOG.md b/CHANGELOG.md
index 37e876d..6a1ec91 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+- Add validator package installation to build-javascript
+- Add validators package installation to build-python
+
 ## 4.5.0 - 2024-06-21
 ### Added
 - Add support to customise the application base directory
diff --git a/src/Makefile-swaggy-c b/src/Makefile-swaggy-c
index d4a72f1..1b7dee0 100644
--- a/src/Makefile-swaggy-c
+++ b/src/Makefile-swaggy-c
@@ -160,6 +160,7 @@ generate-primary:
 
 build-javascript:
 	npm install -g babel-cli
+	npm install validator
 	cd clients/javascript/generated/ && \
 	  npm install && \
 	  npm link && \
@@ -169,7 +170,7 @@ build-javascript:
 
 build-python:
 	sudo apt-get install -y python-setuptools
-	pip install twine wheel pytest
+	pip install twine wheel pytest validators
 	cd clients/python/generated/ && \
 	  pip install -r requirements.txt && \
 	  python3 setup.py sdist bdist_wheel && \