diff --git a/constraints.txt b/constraints.txt
index 3b68238ab..8234cb229 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -198,7 +198,7 @@ sphinxcontrib-htmlhelp==2.0.1
     # via sphinx
 sphinxcontrib-jsmath==1.0.1
     # via sphinx
-sphinxcontrib-qthelp==1.0.3
+sphinxcontrib-qthelp==1.0.6
     # via sphinx
 sphinxcontrib-serializinghtml==1.1.9
     # via sphinx