diff --git a/base/cocoa/dsa_pub.pem b/base/cocoa/dsa_pub.pem
new file mode 100644
index 00000000..18e81668
--- /dev/null
+++ b/base/cocoa/dsa_pub.pem
@@ -0,0 +1,20 @@
+-----BEGIN PUBLIC KEY-----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+-----END PUBLIC KEY-----
diff --git a/se/cocoa/Info.plist b/se/cocoa/Info.plist
index b7bd3c6d..b8bd305e 100644
--- a/se/cocoa/Info.plist
+++ b/se/cocoa/Info.plist
@@ -30,5 +30,7 @@
 	<string>NSApplication</string>
 	<key>SUFeedURL</key>
 	<string>http://www.hardcoded.net/updates/dupeguru.appcast</string>
+	<key>SUPublicDSAKeyFile</key>
+	<string>dsa_pub.pem</string>
 </dict>
 </plist>
diff --git a/se/cocoa/dupeguru.xcodeproj/project.pbxproj b/se/cocoa/dupeguru.xcodeproj/project.pbxproj
index 60e297be..e5583252 100644
--- a/se/cocoa/dupeguru.xcodeproj/project.pbxproj
+++ b/se/cocoa/dupeguru.xcodeproj/project.pbxproj
@@ -19,6 +19,7 @@
 		CE45579B0AE3BC2B005A9546 /* Sparkle.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = CE45579A0AE3BC2B005A9546 /* Sparkle.framework */; };
 		CE4557B40AE3BC50005A9546 /* Sparkle.framework in CopyFiles */ = {isa = PBXBuildFile; fileRef = CE45579A0AE3BC2B005A9546 /* Sparkle.framework */; };
 		CE68EE6809ABC48000971085 /* DirectoryPanel.m in Sources */ = {isa = PBXBuildFile; fileRef = CE68EE6609ABC48000971085 /* DirectoryPanel.m */; };
+		CE6E0DFE1054E9EF008D9390 /* dsa_pub.pem in Resources */ = {isa = PBXBuildFile; fileRef = CE6E0DFD1054E9EF008D9390 /* dsa_pub.pem */; };
 		CE848A1909DD85810004CB44 /* Consts.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = CE848A1809DD85810004CB44 /* Consts.h */; };
 		CECA899909DB12CA00A3D774 /* Details.nib in Resources */ = {isa = PBXBuildFile; fileRef = CECA899709DB12CA00A3D774 /* Details.nib */; };
 		CECA899C09DB132E00A3D774 /* DetailsPanel.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = CECA899A09DB132E00A3D774 /* DetailsPanel.h */; };
@@ -84,6 +85,7 @@
 		CE45579A0AE3BC2B005A9546 /* Sparkle.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Sparkle.framework; path = /Library/Frameworks/Sparkle.framework; sourceTree = "<absolute>"; };
 		CE68EE6509ABC48000971085 /* DirectoryPanel.h */ = {isa = PBXFileReference; fileEncoding = 5; lastKnownFileType = sourcecode.c.h; path = DirectoryPanel.h; sourceTree = SOURCE_ROOT; };
 		CE68EE6609ABC48000971085 /* DirectoryPanel.m */ = {isa = PBXFileReference; fileEncoding = 5; lastKnownFileType = sourcecode.c.objc; path = DirectoryPanel.m; sourceTree = SOURCE_ROOT; };
+		CE6E0DFD1054E9EF008D9390 /* dsa_pub.pem */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = dsa_pub.pem; path = dgbase/dsa_pub.pem; sourceTree = "<group>"; };
 		CE848A1809DD85810004CB44 /* Consts.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Consts.h; sourceTree = "<group>"; };
 		CECA899809DB12CA00A3D774 /* English */ = {isa = PBXFileReference; lastKnownFileType = wrapper.nib; name = English; path = English.lproj/Details.nib; sourceTree = "<group>"; };
 		CECA899A09DB132E00A3D774 /* DetailsPanel.h */ = {isa = PBXFileReference; fileEncoding = 5; lastKnownFileType = sourcecode.c.h; path = DetailsPanel.h; sourceTree = "<group>"; };
@@ -214,6 +216,7 @@
 				CEEB135109C837A2004D2330 /* dupeguru.icns */,
 				8D1107310486CEB800E47090 /* Info.plist */,
 				089C165CFE840E0CC02AAC07 /* InfoPlist.strings */,
+				CE6E0DFD1054E9EF008D9390 /* dsa_pub.pem */,
 				CECA899709DB12CA00A3D774 /* Details.nib */,
 				CE3AA46509DB207900DB3A21 /* Directories.nib */,
 				29B97318FDCFA39411CA2CEA /* MainMenu.nib */,
@@ -364,6 +367,7 @@
 				CEFC7FAD0FC9518A00CD5728 /* ErrorReportWindow.xib in Resources */,
 				CEFC7FAE0FC9518A00CD5728 /* progress.nib in Resources */,
 				CEFC7FAF0FC9518A00CD5728 /* registration.nib in Resources */,
+				CE6E0DFE1054E9EF008D9390 /* dsa_pub.pem in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};