diff --git a/requirements/base.txt b/requirements/base.txt
index 510f54c5..00424d05 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -2,7 +2,7 @@
 # note: it is mandatory to register all dependencies of the required packages.
 
 # Required packages:
-cryptography==2.9
+cryptography==3.3
 defusedxml==0.6.0
 jsonschema==3.2.0
 lxml==4.5.0
diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index 36f65e71..9b26108a
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@ def get_version(*file_paths: Sequence[str]) -> str:
 history = open('HISTORY.rst').read().replace('.. :changelog:', '')
 
 requirements = [
-    'cryptography>=2.8,<3',
+    'cryptography>=2.8,<4',
     'defusedxml>=0.6.0,<1',
     'jsonschema>=3.1.1',
     'lxml>=4.5.0,<5',