diff --git a/docs/games/iidx30/extras.md b/docs/games/iidx30/extras.md
index deaad8e7..ac9b171b 100644
--- a/docs/games/iidx30/extras.md
+++ b/docs/games/iidx30/extras.md
@@ -1,4 +1,4 @@
-# beatmania IIDX 31 RESIDENT
+# beatmania IIDX 30 RESIDENT
 <img src="/img/iidx30-31/resident.png">
 
 !!! danger "Please make sure you downloaded your data from an appropriate source.<br>This guide is unable to troubleshoot any problems related to bad or poorly managed data."
@@ -31,7 +31,7 @@
     ```
 
     - ^^`A`^^ for Standard (LDJ-003, LDJ, 60hz)
-    - ^^`B`^^ for Lightning (LDJ-010, TDJ, 120hz)
+    - ^^`D`^^ for Lightning (LDJ-010, TDJ, 120hz)
     
 ---
 ### Changing the game's language
diff --git a/docs/games/iidx31/extras.md b/docs/games/iidx31/extras.md
index c2f70590..afa9303e 100644
--- a/docs/games/iidx31/extras.md
+++ b/docs/games/iidx31/extras.md
@@ -31,7 +31,7 @@
     ```
 
     - ^^`E`^^ for Standard (LDJ-012, LDJ, 60hz)
-    - ^^`B`^^ for Lightning (LDJ-010, TDJ, 120hz)
+    - ^^`D`^^ for Lightning (LDJ-010, TDJ, 120hz)
     
 ---
 ### Changing the game's language
diff --git a/docs/games/iidx31/setup.md b/docs/games/iidx31/setup.md
index 2bb30c6c..7d541a6c 100644
--- a/docs/games/iidx31/setup.md
+++ b/docs/games/iidx31/setup.md
@@ -90,8 +90,8 @@
 
 	On the line with `<spec __type="str">` the letter needs to match your data type:
 	
-    - ^^`B`^^ for Lightning (LDJ-010, TDJ, 120hz)
     - ^^`E`^^ for Standard (LDJ-012, LDJ, 60hz)
+    - ^^`D`^^ for Lightning (LDJ-010, TDJ, 120hz)
   
 	Replace the letter accordingly if necessary.