diff --git a/tools/oldest_constraints.txt b/tools/oldest_constraints.txt
index de2b83ad8..8dd96dfea 100644
--- a/tools/oldest_constraints.txt
+++ b/tools/oldest_constraints.txt
@@ -49,3 +49,7 @@ requests[security]==2.4.1
 ConfigArgParse==0.10.0
 funcsigs==0.4
 zope.hookable==4.0.4
+
+# Plugin constraints
+boto3==1.4.7
+botocore==1.7.41