diff --git a/.github/workflows/pr-any.yml b/.github/workflows/pr-any.yml
index 525a0d30..b4c33f92 100644
--- a/.github/workflows/pr-any.yml
+++ b/.github/workflows/pr-any.yml
@@ -45,7 +45,7 @@ jobs:
       #   with:
       #     args: yarn e2e
       - name: Upload artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: build
           path: |
diff --git a/package.json b/package.json
index cc86607f..880cbc5a 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "@polkadot/dev": "^0.79.3",
     "@polkadot/dev-test": "^0.79.3",
     "@polkadot/types": "^12.3.1",
-    "@polymeshassociation/polymesh-sdk": "^24.6.0",
+    "@polymeshassociation/polymesh-sdk": "^26.0.0-beta.2",
     "@semantic-release/changelog": "^6.0.3",
     "@semantic-release/exec": "^6.0.3",
     "@semantic-release/git": "^10.0.1",
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index b79d3855..75df4cd7 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -217,11 +217,23 @@ const initApiPromise = (network: NetworkName, networkUrl: string) =>
 
                         did = isMsPrimaryKey
                           ? msLinkedKeyInfoObj.asPrimaryKey.toString()
-                          : msLinkedKeyInfoObj.asSecondaryKey[0].toString();
+                          : (
+                            // This check is required for backwards compatibility with Polymesh v6
+                            // TODO: remove after v7 update
+                            msLinkedKeyInfoObj.asSecondaryKey.length === 32
+                              ? msLinkedKeyInfoObj.asSecondaryKey.toString()
+                              : msLinkedKeyInfoObj.asSecondaryKey[0].toString()
+                          );
                       } else {
                         did = isPrimary
                           ? linkedKeyInfoObj.asPrimaryKey.toString()
-                          : linkedKeyInfoObj.asSecondaryKey[0].toString();
+                          : (
+                            // This check is required for backwards compatibility with Polymesh v6
+                            // TODO: remove after v7 update
+                            linkedKeyInfoObj.asSecondaryKey.length === 32
+                              ? linkedKeyInfoObj.asSecondaryKey.toString()
+                              : linkedKeyInfoObj.asSecondaryKey[0].toString()
+                          );
                       }
 
                       // Initialize identity state for network:did pair
diff --git a/yarn.lock b/yarn.lock
index b71d0276..b91e7e53 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2268,9 +2268,9 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@polymeshassociation/polymesh-sdk@npm:^24.6.0":
-  version: 24.6.0
-  resolution: "@polymeshassociation/polymesh-sdk@npm:24.6.0"
+"@polymeshassociation/polymesh-sdk@npm:^26.0.0-beta.2":
+  version: 26.0.0-beta.2
+  resolution: "@polymeshassociation/polymesh-sdk@npm:26.0.0-beta.2"
   dependencies:
     "@apollo/client": "npm:^3.8.1"
     "@polkadot/api": "npm:11.2.1"
@@ -2288,7 +2288,7 @@ __metadata:
     patch-package: "npm:^8.0.0"
     semver: "npm:^7.5.4"
     websocket: "npm:^1.0.34"
-  checksum: 10c0/6c604be2cf0cc465613225e511b84b886b17087a966ae6166fe84022029bb6ada10c1d9b7c31efa3036e1a0d1d5615e547d38a94c2d2aea998462880df7812d8
+  checksum: 10c0/4d4065328aeefa4b947fde8e8d037024b7af38283a5117651c043c3ef509a34520b52ee91487157b8a17a87a18a58e011f85ab39a03e1512afb40ed0d5947c6a
   languageName: node
   linkType: hard
 
@@ -14811,7 +14811,7 @@ __metadata:
     "@polkadot/dev": "npm:^0.79.3"
     "@polkadot/dev-test": "npm:^0.79.3"
     "@polkadot/types": "npm:^12.3.1"
-    "@polymeshassociation/polymesh-sdk": "npm:^24.6.0"
+    "@polymeshassociation/polymesh-sdk": "npm:^26.0.0-beta.2"
     "@semantic-release/changelog": "npm:^6.0.3"
     "@semantic-release/exec": "npm:^6.0.3"
     "@semantic-release/git": "npm:^10.0.1"