diff --git a/src/main/java/de/diddiz/LogBlock/MaterialConverter.java b/src/main/java/de/diddiz/LogBlock/MaterialConverter.java
index 9dbceac..3d0988c 100644
--- a/src/main/java/de/diddiz/LogBlock/MaterialConverter.java
+++ b/src/main/java/de/diddiz/LogBlock/MaterialConverter.java
@@ -154,7 +154,7 @@ public class MaterialConverter {
             return null;
         }
         if (blockStateId >= 0 && blockStateId < idToBlockState.length && idToBlockState[blockStateId] != null) {
-            material = material + idToBlockState[blockStateId];
+            material = material + updateBlockState(material, idToBlockState[blockStateId]);
         }
         try {
             return Bukkit.createBlockData(material);
@@ -236,4 +236,21 @@ public class MaterialConverter {
             nextBlockStateId = key + 1;
         }
     }
+
+    private static String updateBlockState(String material, String blockState) {
+        // since 1.16
+        if (material.endsWith("_wall")) {
+            if (blockState.contains("east=false") || blockState.contains("east=true")) {
+                blockState = blockState.replace("east=false", "east=none");
+                blockState = blockState.replace("west=false", "west=none");
+                blockState = blockState.replace("north=false", "north=none");
+                blockState = blockState.replace("south=false", "south=none");
+                blockState = blockState.replace("east=true", "east=low");
+                blockState = blockState.replace("west=true", "west=low");
+                blockState = blockState.replace("north=true", "north=low");
+                blockState = blockState.replace("south=true", "south=low");
+            }
+        }
+        return blockState;
+    }
 }
diff --git a/src/main/resources/blockdata.txt b/src/main/resources/blockdata.txt
index 4a6dd57..8859bb3 100644
--- a/src/main/resources/blockdata.txt
+++ b/src/main/resources/blockdata.txt
@@ -1113,8 +1113,8 @@
 137:14,minecraft:command_block[conditional=true,facing=down]
 137:15,minecraft:command_block[conditional=true,facing=up]
 138:0,minecraft:beacon
-139:0,minecraft:cobblestone_wall[east=false,north=false,south=false,up=false,waterlogged=false,west=false]
-139:1,minecraft:mossy_cobblestone_wall[east=false,north=false,south=false,up=false,waterlogged=false,west=false]
+139:0,minecraft:cobblestone_wall[east=none,north=none,south=none,up=false,waterlogged=false,west=none]
+139:1,minecraft:mossy_cobblestone_wall[east=none,north=none,south=none,up=false,waterlogged=false,west=none]
 140:0,minecraft:flower_pot
 141:0,minecraft:carrots[age=0]
 141:1,minecraft:carrots[age=1]