diff --git a/.gitmodules b/.gitmodules
index b1d1263..3ee2444 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "trustwallet"]
 	path = trustwallet
 	url = https://github.com/trustwallet/assets.git
+[submodule "topic0"]
+	path = topic0
+	url = https://github.com/wmitsuda/topic0.git
diff --git a/nginx.conf b/nginx.conf
index 55189ba..932cfeb 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -43,6 +43,40 @@ server {
         }
     }
 
+    location /topic0 {
+        root   /usr/share/nginx/html;
+        expires 30d;
+
+        # Base on: https://michielkalkman.com/snippets/nginx-cors-open-configuration/
+        if ($request_method = 'OPTIONS') {
+            add_header 'Access-Control-Allow-Origin' '*';
+            #
+            # Om nom nom cookies
+            #
+            add_header 'Access-Control-Allow-Credentials' 'true';
+            add_header 'Access-Control-Allow-Methods' 'GET, OPTIONS';
+
+            #
+            # Custom headers and headers various browsers *should* be OK with but aren't
+            #
+            add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
+
+            #
+            # Tell client that this pre-flight info is valid for 20 days
+            #
+            add_header 'Access-Control-Max-Age' 1728000;
+            add_header 'Content-Type' 'text/plain charset=UTF-8';
+            add_header 'Content-Length' 0;
+            return 204;
+        }
+        if ($request_method = 'GET') {
+            add_header 'Access-Control-Allow-Origin' '*' always;
+            add_header 'Access-Control-Allow-Credentials' 'true' always;
+            add_header 'Access-Control-Allow-Methods' 'GET, OPTIONS' always;
+            add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type' always;
+        }
+    }
+
     location /assets {
         root   /usr/share/nginx/html;
         expires 30d;
diff --git a/package.json b/package.json
index ee371c8..86bb040 100644
--- a/package.json
+++ b/package.json
@@ -52,8 +52,8 @@
     "test": "craco test",
     "eject": "react-scripts eject",
     "source-map-explorer": "source-map-explorer build/static/js/*.js",
-    "assets-start": "docker run --rm -p 3001:80 --name otterscan-assets -d -v$(pwd)/4bytes/signatures:/usr/share/nginx/html/signatures/ -v$(pwd)/trustwallet/blockchains/ethereum/assets:/usr/share/nginx/html/assets -v$(pwd)/nginx.conf:/etc/nginx/conf.d/default.conf nginx:1.21.1-alpine",
-    "assets-start-with-param-names": "docker run --rm -p 3001:80 --name otterscan-assets -d -v$(pwd)/4bytes/with_parameter_names:/usr/share/nginx/html/signatures/ -v$(pwd)/trustwallet/blockchains/ethereum/assets:/usr/share/nginx/html/assets -v$(pwd)/nginx.conf:/etc/nginx/conf.d/default.conf nginx:1.21.1-alpine",
+    "assets-start": "docker run --rm -p 3001:80 --name otterscan-assets -d -v$(pwd)/4bytes/signatures:/usr/share/nginx/html/signatures/ -v$(pwd)/trustwallet/blockchains/ethereum/assets:/usr/share/nginx/html/assets -v$(pwd)/topic0/with_parameter_names:/usr/share/nginx/html/topic0/ -v$(pwd)/nginx.conf:/etc/nginx/conf.d/default.conf nginx:1.21.1-alpine",
+    "assets-start-with-param-names": "docker run --rm -p 3001:80 --name otterscan-assets -d -v$(pwd)/4bytes/with_parameter_names:/usr/share/nginx/html/signatures/ -v$(pwd)/trustwallet/blockchains/ethereum/assets:/usr/share/nginx/html/assets -v$(pwd)/topic0/with_parameter_names:/usr/share/nginx/html/topic0/ -v$(pwd)/nginx.conf:/etc/nginx/conf.d/default.conf nginx:1.21.1-alpine",
     "assets-stop": "docker stop otterscan-assets",
     "docker-build": "DOCKER_BUILDKIT=1 docker build -t otterscan -f Dockerfile .",
     "docker-start": "docker run --rm -p 5000:80 --name otterscan -d otterscan",
diff --git a/topic0 b/topic0
new file mode 160000
index 0000000..0935568
--- /dev/null
+++ b/topic0
@@ -0,0 +1 @@
+Subproject commit 09355687ff39648ae4a1b9729f605296a228c5e9