diff --git a/lib/app_ids.json b/lib/app_ids.json
deleted file mode 100644
index 239e2c9..0000000
--- a/lib/app_ids.json
+++ /dev/null
@@ -1,14 +0,0 @@
-{
-  "4": {
-    "Contribution": "0x09f5274cba299b46c5be722ef672d10eef7a2ef980b612aef529d74fb9da7643",
-    "Contributor": "0x8e50972b062e83b48dbb2a68d8a058f2a07227ca183c144dc974e6da3186d7e9",
-    "Proposal": "0xb48bc8b4e539823f3be98d67f4130c07b5d29cc998993debcdea15c6faf4cf8a",
-    "Token": "0x82c0e483537d703bb6f0fc799d2cc60d8f62edcb0f6d26d5571a92be8485b112"
-  },
-  "41787949": {
-    "Contribution": "0xe401b988b8af39119004de5c7691a60391d69d873b3120682a8c61306a4883ce",
-    "Contributor": "0x7829d33291d6e118d115ce321de9341894a2da120bd35505fc03b98f715c606d",
-    "Proposal": "0x15d03d435b24a74317868c24fda4646302076b59272241a122a3868eb5c745da",
-    "Token": "0x85b0f626cecde6188d11940904fedeb16a4d49b0e8c878b9d109b23d38062ca7"
-  }
-}
diff --git a/lib/contracts/kernel.js b/lib/contracts/kernel.js
index 7f7f8fd..84ac26f 100644
--- a/lib/contracts/kernel.js
+++ b/lib/contracts/kernel.js
@@ -1,8 +1,13 @@
-const AppIds = require('../app_ids.json');
+const namehash = require('eth-ens-namehash').hash;
 const Base = require('./base');
+
 const KERNEL_APP_ADDR_NAMESPACE = '0xd6f028ca0e8edb4a8c9757ca4fdccab25fa1e0317da1188108f7d2dee14902fb';
 
 class Kernel extends Base {
+  constructor(contract) {
+    super(contract);
+    this.apm = 'aragonpm.eth'; // can be overwritten if needed
+  }
 
   getApp(appName) {
     if (appName === 'Acl') {
@@ -12,9 +17,7 @@ class Kernel extends Base {
   }
 
   appNamehash(appName) {
-    // actually provider.network is an asynchronous property.
-    // but when we call this function kredits is already initialized and the network is already loaded
-    return AppIds[this.contract.provider.network.chainId.toString()][appName];
+    return namehash(`kredits-${appName.toLowerCase()}.${this.apm}`);
   }
 }
 
diff --git a/lib/kredits.js b/lib/kredits.js
index 2f80b8d..ef47795 100644
--- a/lib/kredits.js
+++ b/lib/kredits.js
@@ -36,6 +36,7 @@ class Kredits {
 
     this.provider = provider;
     this.signer = signer;
+    this.options = options;
     this.addresses = addresses || {};
     this.abis = abis || ABIS;
     this.ipfs = new IPFS(ipfsConfig);
@@ -66,7 +67,12 @@ class Kredits {
   }
 
   get Kernel() {
-    return this.contractFor('Kernel');
+    let k = this.contractFor('Kernel');
+    // in case we want to use a special apm (e.g. development vs. production)
+    if (this.options.apm) {
+      k.apm = this.options.apm;
+    }
+    return k;
   }
 
   get Contributor() {