diff --git a/docs/constraints.txt b/docs/constraints.txt
index 24474af..308599e 100644
--- a/docs/constraints.txt
+++ b/docs/constraints.txt
@@ -7,7 +7,7 @@ cffi==1.15.1
 charset-normalizer==2.1.0
 cssselect2==0.6.0
 defusedxml==0.7.1
-docutils==0.18.1
+docutils==0.19
 idna==3.3
 imagesize==1.4.1
 importlib-metadata==4.12.0
@@ -27,11 +27,11 @@ sphinxcontrib-applehelp==1.0.2
 sphinxcontrib-devhelp==1.0.2
 sphinxcontrib-htmlhelp==2.0.0
 sphinxcontrib-jsmath==1.0.1
-sphinxcontrib-plantuml==0.23
+sphinxcontrib-plantuml==0.24
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
 sphinxcontrib-svg2pdfconverter==1.2.0
 tinycss2==1.1.1
-urllib3==1.26.9
+urllib3==1.26.10
 webencodings==0.5.1
-zipp==3.8.0
+zipp==3.8.1