diff --git a/FlowplayerSDK/Package.swift b/FlowplayerSDK/Package.swift
index 4559544..11ce982 100644
--- a/FlowplayerSDK/Package.swift
+++ b/FlowplayerSDK/Package.swift
@@ -20,7 +20,7 @@ let package = Package(
     .binaryTarget(
       name: "FlowplayerSDK",
       url: "https://github.com/flowplayer/apple-sdk-releases/releases/download/\(version)/FlowplayerSDK.zip",
-      checksum: "8d2a99256f69155101c0520ffbe692e622b5288a91d2891cdddb0da94c7623b0"
+      checksum: "38dc1f789192157afdb457a5a947b8500771aea8a5395ef2d90c60c8b5889988"
     ),
   ]
 )
diff --git a/FlowplayerSDK/Package.swift-E b/FlowplayerSDK/Package.swift-E
new file mode 100644
index 0000000..3a71be1
--- /dev/null
+++ b/FlowplayerSDK/Package.swift-E
@@ -0,0 +1,26 @@
+// swift-tools-version: 5.6
+
+import PackageDescription
+
+let version = "4.0.0-rc.1"
+
+let package = Package(
+  name: "FlowplayerSDK",
+  platforms: [
+    .iOS(.v14),
+    .tvOS(.v14),
+  ],
+  products: [
+    .library(
+      name: "FlowplayerSDK",
+      targets: ["FlowplayerSDK"]
+    ),
+  ],
+  targets: [
+    .binaryTarget(
+      name: "FlowplayerSDK",
+      url: "https://github.com/flowplayer/apple-sdk-releases/releases/download/\(version)/FlowplayerSDK.zip",
+      checksum: "400.1"
+    ),
+  ]
+)
diff --git a/Scripts/UpdateManifests.bash b/Scripts/UpdateManifests.bash
index 9ba4d3f..53e0b87 100755
--- a/Scripts/UpdateManifests.bash
+++ b/Scripts/UpdateManifests.bash
@@ -17,16 +17,14 @@ echo "🗃️ Downloaded $BINARY_NAME"
 
 echo "Updaing Package.swift..."
 # Calculate new checksum
-touch Package.swift # need for swift package compute-checksum to work
-NEW_CHECKSUM=$(shasum -a 256 $BINARY_NAME)
-rm Package.swift # delete it as it is not needed anymore
+NEW_CHECKSUM=$(shasum -a 256 $BINARY_NAME | awk '{ print $1 }')
 echo "🔐 New checksum is: $NEW_CHECKSUM"
 
 # Replace version information in package manifest
 sed -E -i '' 's/let version = ".+"/let version = "'$NEW_VERSION\"/ FlowplayerSDK/Package.swift
 
 # Replace checksum information in package manifest
-sed -E -i '' 's/checksum: ".+"/checksum: "'$NEW_CHECKSUM\"/ FlowplayerSDK/Package.swift
+sed -i -E "s/checksum: \".*\"/checksum: \"$NEW_CHECKSUM\"/" FlowplayerSDK/Package.swift
 
 # print out package manifes for convenience reasons
 echo "📜 New Package Manifest is:"