diff --git a/DEPENDENCIES.md b/DEPENDENCIES.md
index 50044892de77876c47c45760c47f1f5e9fdc5d9d..15b3e417102aa64e1c46208d609e5a1415d6080b 100644
--- a/DEPENDENCIES.md
+++ b/DEPENDENCIES.md
@@ -3,7 +3,7 @@
 
 # BUILD DOCS
 
-* >=cmake-3.14
+* >=cmake-3.13
 * >=protoc-3.12
 * =[protoc-gen-doc](https://github.com/pseudomuto/protoc-gen-doc@)-1.4.1
 * >=python-3.7
diff --git a/README_SETUP.md b/README_SETUP.md
index fd9a0ededf8bddd88874714ada1e731600f67ecf..78222f06fbd69347ab3dbc54ac4943caa5eabb9c 100644
--- a/README_SETUP.md
+++ b/README_SETUP.md
@@ -32,6 +32,6 @@ Results are in `build/doc_out/index.html`.
 
 ### Dependencies
 
-* cmake >= v3.14
+* cmake >= v3.13
 * protoc >= v3.12
 * all the pypi packages from `doc/requirements.txt`.