diff --git a/requirements.txt b/requirements.txt
index f9ad916..80be17a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
-requests
+requests==2.24.0
 
 # testing
-mock
-httpretty
-coverage
-coveralls
\ No newline at end of file
+mock==4.0.2
+httpretty==0.9.7
+coverage==5.2.1
+coveralls==2.1.2