diff --git a/lower-constraints.txt b/lower-constraints.txt
index 43f2b016cb..8faabf217e 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -99,7 +99,7 @@ PyNaCl==1.2.1
 pyOpenSSL==17.5.0
 pyparsing==2.2.0
 pyperclip==1.6.0
-pysaml2==4.0.2
+pysaml2==4.5.0
 python-dateutil==2.7.0
 python-editor==1.0.3
 python-keystoneclient==3.8.0
diff --git a/requirements.txt b/requirements.txt
index 83ad7ef5ed..d6720ba782 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ oslo.policy>=1.30.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 oauthlib>=0.6.2 # BSD
-pysaml2>=4.0.2,!=4.0.3,!=4.0.4,!=4.0.5,!=4.0.5rc1,!=4.1.0,!=4.2.0,!=4.3.0,!=4.4.0
+pysaml2>=4.5.0
 dogpile.cache>=0.6.2 # BSD
 jsonschema<3.0.0,>=2.6.0 # MIT
 pycadf!=2.0.0,>=1.1.0 # Apache-2.0