diff --git a/HISTORY.rst b/HISTORY.rst
index 304d938..8c71d19 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -6,7 +6,8 @@ Release History
 1.0.6 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Fixes RSA public exponent issue.
+- Switches dependency pycrypto to pycryptodome. 
 
 
 1.0.5 (2019-11-18)
diff --git a/requirements.txt b/requirements.txt
index 1b3f8b3..1bc97c6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 requests>=0.10
-pycryptodome
+pycryptodome>=3.9.6,<4.0.0
 pathlib==1.0.1
 tenacity>=5.1.5,<6.0.0