diff --git a/docs/requirements.txt b/docs/requirements.txt
index b86f15c47c3..42e7e7afbf9 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -14,6 +14,7 @@ matplotlib
 mock
 numpy
 pandas
+prompt_toolkit
 psutil
 pyasn1>0.4.1
 pyasn1_modules
diff --git a/docs/requirements_py3.txt b/docs/requirements_py3.txt
index 2bcdd1038ac..ec6caacbd0f 100644
--- a/docs/requirements_py3.txt
+++ b/docs/requirements_py3.txt
@@ -15,6 +15,7 @@ pyasn1>0.4.1
 pyasn1_modules
 pyparsing
 pytz
+prompt_toolkit
 recommonmark
 sqlalchemy
 subprocess32