diff --git a/requirements.txt b/requirements.txt
index 17d93b15..3807e588 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 pycaption==2.1.0
 requests>=2.9.1,<3.0.0
 babelfish>=0.5.5,<0.6.0
-Xblock>=4.0.1,<5.0.0
+Xblock==5.3.0
 django-statici18n>=2.5.0,<3.0.0
 
 -e git+https://github.com/edx/i18n-tools.git@v0.5.3#egg=edx-i18n-tools