diff --git a/Rebel.xcodeproj/project.pbxproj b/Rebel.xcodeproj/project.pbxproj
index 7a2e747..3bb8265 100644
--- a/Rebel.xcodeproj/project.pbxproj
+++ b/Rebel.xcodeproj/project.pbxproj
@@ -8,6 +8,7 @@
 
 /* Begin PBXBuildFile section */
 		301569981602161400E3BE46 /* QuartzCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 306A81EC1601F44200BF45F3 /* QuartzCore.framework */; };
+		304692F21607259A00B79746 /* EXTKeyPathCoding.h in Headers */ = {isa = PBXBuildFile; fileRef = 304692F11607259A00B79746 /* EXTKeyPathCoding.h */; };
 		306A81DB1601C7A300BF45F3 /* RBLPopover.h in Headers */ = {isa = PBXBuildFile; fileRef = 306A81D91601C7A300BF45F3 /* RBLPopover.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		306A81DC1601C7A300BF45F3 /* RBLPopover.m in Sources */ = {isa = PBXBuildFile; fileRef = 306A81DA1601C7A300BF45F3 /* RBLPopover.m */; };
 		306A81E81601E92000BF45F3 /* CAAnimation+RBLBlockAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = 306A81E61601E92000BF45F3 /* CAAnimation+RBLBlockAdditions.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -152,6 +153,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		304692F11607259A00B79746 /* EXTKeyPathCoding.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = EXTKeyPathCoding.h; path = ReactiveCocoa/ReactiveCocoaFramework/ReactiveCocoa/libextobjc/extobjc/EXTKeyPathCoding.h; sourceTree = "<group>"; };
 		306A81D91601C7A300BF45F3 /* RBLPopover.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RBLPopover.h; sourceTree = "<group>"; };
 		306A81DA1601C7A300BF45F3 /* RBLPopover.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RBLPopover.m; sourceTree = "<group>"; };
 		306A81E61601E92000BF45F3 /* CAAnimation+RBLBlockAdditions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "CAAnimation+RBLBlockAdditions.h"; sourceTree = "<group>"; };
@@ -238,6 +240,14 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		304692E71607258E00B79746 /* libextobjc */ = {
+			isa = PBXGroup;
+			children = (
+				304692F11607259A00B79746 /* EXTKeyPathCoding.h */,
+			);
+			name = libextobjc;
+			sourceTree = "<group>";
+		};
 		D06AD2FD15C636EF00A73D8E /* Products */ = {
 			isa = PBXGroup;
 			children = (
@@ -400,6 +410,7 @@
 		D09AE4E115C5F45200ECAD10 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				304692E71607258E00B79746 /* libextobjc */,
 				D08BB2EE15CB307D00CC9868 /* Expecta.xcodeproj */,
 				D08BB2F115CB307D00CC9868 /* Specta.xcodeproj */,
 				D06AD2FC15C636EF00A73D8E /* ReactiveCocoa.xcodeproj */,
@@ -477,6 +488,7 @@
 				306A81E81601E92000BF45F3 /* CAAnimation+RBLBlockAdditions.h in Headers */,
 				306A81DB1601C7A300BF45F3 /* RBLPopover.h in Headers */,
 				889E5E0F15FFDAE0007F2445 /* RBLViewModel.h in Headers */,
+				304692F21607259A00B79746 /* EXTKeyPathCoding.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/Rebel/RBLPopover.m b/Rebel/RBLPopover.m
index 4d9d8cd..edab183 100644
--- a/Rebel/RBLPopover.m
+++ b/Rebel/RBLPopover.m
@@ -12,6 +12,7 @@
 #import "NSColor+RBLCGColorAdditions.h"
 
 #import <QuartzCore/QuartzCore.h>
+#import "EXTKeyPathCoding.h"
 
 //***************************************************************************
 
@@ -236,11 +237,11 @@ static NSTimeInterval const RBLPopoverDefaultFadeDuration = 0.3;
 	};
 	
 	if (self.animates) {
-		CABasicAnimation *fadeInAnimation = [CABasicAnimation animationWithKeyPath:@"alphaValue"];
+		CABasicAnimation *fadeInAnimation = [CABasicAnimation animationWithKeyPath:@keypath(@"alphaValue")];
 		fadeInAnimation.duration = RBLPopoverDefaultFadeDuration;
 		fadeInAnimation.rbl_completionBlock = postDisplayBlock;
 		
-		self.popoverWindow.animations = @{ @"alphaValue": fadeInAnimation };
+		self.popoverWindow.animations = @{ @keypath(@"alphaValue"): fadeInAnimation };
 		self.animating = YES;
 		[self.popoverWindow.animator setAlphaValue:1.0];
 	} else {
@@ -273,11 +274,11 @@ static NSTimeInterval const RBLPopoverDefaultFadeDuration = 0.3;
 	};
 	
 	if (self.animates) {
-		CABasicAnimation *fadeOutAnimation = [CABasicAnimation animationWithKeyPath:@"alphaValue"];
+		CABasicAnimation *fadeOutAnimation = [CABasicAnimation animationWithKeyPath:@keypath(@"alphaValue")];
 		fadeOutAnimation.duration = duration;
 		fadeOutAnimation.rbl_completionBlock = windowTeardown;
 		
-		self.popoverWindow.animations = @{ @"alphaValue": fadeOutAnimation };
+		self.popoverWindow.animations = @{ @keypath(@"alphaValue"): fadeOutAnimation };
 		self.animating = YES;
 		[self.popoverWindow.animator setAlphaValue:0.0];
 	} else {