diff --git a/doc/requirements.txt b/doc/requirements.txt
index d22ad5a..6a638b5 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,14 +1,14 @@
 -r ../requirements.txt
 
-pyTooling>=2.13.0, <3.0
+pyTooling >= 5.0.0, < 6.0
 
 # Enforce latest version on ReadTheDocs
-sphinx >=5.3, <6.0
+sphinx >=5.3, < 6.0
 
 # Sphinx Extenstions
 #sphinx.ext.coverage
 #sphinxcontrib-actdiag>=0.8.5
-sphinxcontrib-mermaid>=0.8.1
+sphinxcontrib-mermaid>=0.9.2
 #sphinxcontrib-seqdiag>=0.8.5
 #sphinxcontrib-textstyle>=0.2.1
 #sphinxcontrib-spelling>=2.2.0