diff --git a/requirements.txt b/requirements.txt
index 102233e..9c93708 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 # Must be aligned with setup.py.
-cleo==0.6.8
+cleo==2.0.0
 lxml>=4.6.1, <5
 
 # For development only.
diff --git a/setup.py b/setup.py
index 41f638d..8425730 100644
--- a/setup.py
+++ b/setup.py
@@ -48,6 +48,6 @@
             ],
         },
 
-        install_requires=['cleo==0.6.8',
+        install_requires=['cleo==2.0.0',
                           'lxml>=4.6.1, <5']
 )