diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 00000000..25adc681
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1 @@
+mkdocs==1.3.1
\ No newline at end of file
diff --git a/mkdocs.yml b/mkdocs.yml
index 9df8d44d..7ee97780 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -1,4 +1,6 @@
 site_name: PySimpleGUI
 theme:
     name: mkdocs
-    custom_dir: docs_modification/
\ No newline at end of file
+    custom_dir: docs_modification/
+dependencies:
+  - mkdocs==1.3.1
\ No newline at end of file