diff --git a/.circleci/config.yml b/.circleci/config.yml
index 96e85e2..aaeb920 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -47,10 +47,10 @@ jobs:
     steps:
       - pod-install
       - restore_cache:
-          key: 1-opencv-{{ .Branch }}
-      - run: for package in opencv xz $(brew deps opencv); do brew link $package || brew install $package; done
+          key: 2-opencv-{{ .Branch }}
+      - run: for package in opencv@2 xz $(brew deps opencv@2); do brew link $package || brew install $package; done
       - save_cache:
-          key: 1-opencv-{{ .Branch }}
+          key: 2-opencv-{{ .Branch }}
           paths:
             - /usr/local/Cellar/
       - run:
diff --git a/Example/PerspectiveTransform.xcodeproj/project.pbxproj b/Example/PerspectiveTransform.xcodeproj/project.pbxproj
index a492d66..7fd15cf 100644
--- a/Example/PerspectiveTransform.xcodeproj/project.pbxproj
+++ b/Example/PerspectiveTransform.xcodeproj/project.pbxproj
@@ -795,10 +795,10 @@
 			buildSettings = {
 				HEADER_SEARCH_PATHS = (
 					"$(inherited)",
-					/usr/local/include,
+					"/usr/local/opt/opencv@2/include",
 				);
 				INFOPLIST_FILE = Specs/Info.plist;
-				LIBRARY_SEARCH_PATHS = /usr/local/lib/;
+				LIBRARY_SEARCH_PATHS = "/usr/local/opt/opencv@2/lib/";
 				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_BUNDLE_IDENTIFIER = "paulz.github.io.PerspectiveTransform.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -813,10 +813,10 @@
 			buildSettings = {
 				HEADER_SEARCH_PATHS = (
 					"$(inherited)",
-					/usr/local/include,
+					"/usr/local/opt/opencv@2/include",
 				);
 				INFOPLIST_FILE = Specs/Info.plist;
-				LIBRARY_SEARCH_PATHS = /usr/local/lib/;
+				LIBRARY_SEARCH_PATHS = "/usr/local/opt/opencv@2/lib/";
 				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				PRODUCT_BUNDLE_IDENTIFIER = "paulz.github.io.PerspectiveTransform.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";