diff --git a/Mac/Resources/NetNewsWire-dev.entitlements b/Mac/Resources/NetNewsWire-dev.entitlements
new file mode 100644
index 000000000..f6af14e2f
--- /dev/null
+++ b/Mac/Resources/NetNewsWire-dev.entitlements
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+	<key>com.apple.security.automation.apple-events</key>
+	<true/>
+	<key>com.apple.security.files.user-selected.read-write</key>
+	<true/>
+	<key>com.apple.security.network.client</key>
+	<true/>
+	<key>com.apple.security.temporary-exception.apple-events</key>
+	<array>
+		<string>com.red-sweater.marsedit4</string>
+	</array>
+</dict>
+</plist>
diff --git a/iOS/Resources/NetNewsWire-dev.entitlements b/iOS/Resources/NetNewsWire-dev.entitlements
new file mode 100644
index 000000000..05d04e805
--- /dev/null
+++ b/iOS/Resources/NetNewsWire-dev.entitlements
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.$(ORGANIZATION_IDENTIFIER).NetNewsWire.iOS</string>
+	</array>
+	<key>keychain-access-groups</key>
+	<array>
+		<string>$(AppIdentifierPrefix)$(ORGANIZATION_IDENTIFIER).NetNewsWire.iOS</string>
+	</array>
+</dict>
+</plist>