diff --git a/iob_cache.py b/iob_cache.py
index ee89668..b8d5370 100755
--- a/iob_cache.py
+++ b/iob_cache.py
@@ -288,6 +288,12 @@ def _init_attributes(cls):
                 "wire_prefix": "",
                 "descr": "AXI4 interface",
                 "ports": [],
+                "widths": {
+                    "ID_W": "AXI_ID_W",
+                    "ADDR_W": "AXI_ADDR_W",
+                    "DATA_W": "AXI_DATA_W",
+                    "LEN_W": "AXI_LEN_W",
+                },
             },
             {
                 "name": "axi_write",
@@ -296,6 +302,12 @@ def _init_attributes(cls):
                 "wire_prefix": "",
                 "descr": "AXI4 write interface",
                 "ports": [],
+                "widths": {
+                    "ID_W": "AXI_ID_W",
+                    "ADDR_W": "AXI_ADDR_W",
+                    "DATA_W": "AXI_DATA_W",
+                    "LEN_W": "AXI_LEN_W",
+                },
             },
             {
                 "name": "axi_read",
@@ -304,6 +316,12 @@ def _init_attributes(cls):
                 "wire_prefix": "",
                 "descr": "AXI4 read interface",
                 "ports": [],
+                "widths": {
+                    "ID_W": "AXI_ID_W",
+                    "ADDR_W": "AXI_ADDR_W",
+                    "DATA_W": "AXI_DATA_W",
+                    "LEN_W": "AXI_LEN_W",
+                },
             },
             {
                 "name": "fe",
diff --git a/submodules/LIB b/submodules/LIB
index 7eeee1c..320c576 160000
--- a/submodules/LIB
+++ b/submodules/LIB
@@ -1 +1 @@
-Subproject commit 7eeee1c02cdd79ee9e639976623c3d494ba52c69
+Subproject commit 320c5768eb3455d221327d17f456229404047c59