diff --git a/requirements.txt b/requirements.txt
index eed887d..ac9754b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ scipy>=1.6.1
 matplotlib>=2.0.0
 ase>=3.22.1
 torch>=1.1.0
-phonopy==2.3.2
+phonopy>=2.20.0
 spglib>=1.12.1
 monty>=3.0.2
 seekpath>=1.9.5
diff --git a/setup.py b/setup.py
index 06b679d..e204998 100644
--- a/setup.py
+++ b/setup.py
@@ -40,7 +40,7 @@
         'matplotlib>=2.0.0',
         'ase>=3.22.1',
         'torch>=1.10.2',
-        'phonopy==2.3.2', #tmp fix
+        'phonopy==2.20.0', 
         'spglib>=1.12.1',
         'monty>=3.0.2',
         'seekpath>=1.9.5',