diff --git a/src/ptbench/engine/trainer.py b/src/ptbench/engine/trainer.py
index 0db5386cba01a34724b08c714c7e999983f90a3d..896ce9a3ed7440dba20708b5c63524e5788a3dbb 100644
--- a/src/ptbench/engine/trainer.py
+++ b/src/ptbench/engine/trainer.py
@@ -41,6 +41,7 @@ class AcceleratorProcessor:
 
         if len(split_accelerator) > 1:
             devices = split_accelerator[1:]
+            devices = [int(i) for i in devices]
         else:
             devices = "auto"