diff --git a/.github/workflows/backport.yml b/.github/workflows/backport.yml
index 7eb665050..72dcfcd60 100644
--- a/.github/workflows/backport.yml
+++ b/.github/workflows/backport.yml
@@ -98,6 +98,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
+          pip cache purge
           pip install .[dev]
 
       - name: Prune non-${{matrix.target_branch}} rules
diff --git a/pyproject.toml b/pyproject.toml
index 623f10d9b..27e5ad3f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ dependencies = [
 	"detection-rules-kibana @ git+https://github.com/elastic/detection-rules.git#subdirectory=lib/kibana"
 ]
 [project.optional-dependencies]
-dev = ["pep8-naming==0.13.0", "PyGithub==2.2.0", "flake8==7.0.0", "pyflakes==3.2.0", "pytest>=8.1.1", "pre-commit==3.6.2"]
+dev = ["pep8-naming==0.13.0", "PyGithub==2.2.0", "flake8==7.0.0", "pyflakes==3.2.0", "pytest>=8.1.1", "nodeenv==1.8.0", "pre-commit==3.6.2"]
 
 [project.urls]
 "Homepage" = "https://github.com/elastic/detection-rules"