diff --git a/WORKSPACE b/WORKSPACE
index e8a305870..336783b67 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -211,7 +211,7 @@ new_local_repository(
     # For local MacOS builds, the path should point to an opencv@3 installation.
     # If you edit the path here, you will also need to update the corresponding
     # prefix in "opencv_macos.BUILD".
-    path = "/usr/local",
+    path = "/opt",
 )
 
 new_local_repository(
@@ -223,7 +223,7 @@ new_local_repository(
 new_local_repository(
     name = "windows_opencv",
     build_file = "@//third_party:opencv_windows.BUILD",
-    path = "C:\\opencv\\build",
+    path = "D:\\opencv\\build",
 )
 
 http_archive(
diff --git a/third_party/opencv_macos.BUILD b/third_party/opencv_macos.BUILD
index 3c17155d2..70d42e464 100644
--- a/third_party/opencv_macos.BUILD
+++ b/third_party/opencv_macos.BUILD
@@ -1,15 +1,15 @@
 # Description:
 #   OpenCV libraries for video/image processing on MacOS
 
+load("@bazel_skylib//lib:paths.bzl", "paths")
+
 licenses(["notice"])  # BSD license
 
 exports_files(["LICENSE"])
 
-load("@bazel_skylib//lib:paths.bzl", "paths")
-
 # The path to OpenCV is a combination of the path set for "macos_opencv"
 # in the WORKSPACE file and the prefix here.
-PREFIX = "opt/opencv@3"
+PREFIX = "homebrew"
 
 cc_library(
     name = "opencv",
@@ -25,8 +25,8 @@ cc_library(
             paths.join(PREFIX, "lib/libopencv_videoio.dylib"),
         ],
     ),
-    hdrs = glob([paths.join(PREFIX, "include/opencv2/**/*.h*")]),
-    includes = [paths.join(PREFIX, "include/")],
+    hdrs = glob([paths.join(PREFIX, "include/opencv4/opencv2/**/*.h*")]),
+    includes = [paths.join(PREFIX, "include/opencv4/")],
     linkstatic = 1,
     visibility = ["//visibility:public"],
 )
diff --git a/third_party/opencv_windows.BUILD b/third_party/opencv_windows.BUILD
index ecf788ee0..7760e3897 100644
--- a/third_party/opencv_windows.BUILD
+++ b/third_party/opencv_windows.BUILD
@@ -5,7 +5,7 @@ licenses(["notice"])  # BSD license
 
 exports_files(["LICENSE"])
 
-OPENCV_VERSION = "3410"  # 3.4.10
+OPENCV_VERSION = "3415"  # 3.4.15
 
 config_setting(
     name = "opt_build",
@@ -17,7 +17,7 @@ config_setting(
     values = {"compilation_mode": "dbg"},
 )
 
-# The following build rule assumes that the executable "opencv-3.4.10-vc14_vc15.exe"
+# The following build rule assumes that the executable "opencv-3.4.15-vc14_vc15.exe"
 # is downloaded and the files are extracted to local.
 # If you install OpenCV separately, please modify the build rule accordingly.
 cc_library(