diff --git a/setup.py b/setup.py
index bc43d764..5e011868 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@
         "sphinx_rtd_theme==1.3.0",
         "sphinxcontrib-applehelp==1.0.2",
         "sphinxcontrib-devhelp==1.0.2",
-        "sphinxcontrib-htmlhelp==2.0.1",
+        "sphinxcontrib-htmlhelp==2.0.0",
         "sphinxcontrib-jquery==4.1",
         "sphinxcontrib-qthelp==1.0.3",
         "sphinxcontrib-serializinghtml==1.1.5",