diff --git a/README_dev_en.md b/README_dev_en.md
index 4cd44ff7..5440e348 100644
--- a/README_dev_en.md
+++ b/README_dev_en.md
@@ -4,7 +4,7 @@
 
 ## Prerequisit
 
-- Linux or WSL2 (not tested for Mac )
+- Linux(ubuntu, debian) or WSL2, (not tested for other linux distributions and Mac)
 - Anaconda
 
 ## Preparation
diff --git a/README_dev_ja.md b/README_dev_ja.md
index c59f421f..9ad2a9bb 100644
--- a/README_dev_ja.md
+++ b/README_dev_ja.md
@@ -4,7 +4,7 @@
 
 ## 前提
 
-- Linux or WSL2 (not tested for Mac )
+- Linux(ubuntu, debian) or WSL2, (not tested for other linux distributions and Mac)
 - Anaconda
 
 ## 準備