diff --git a/community/gmic/PKGBUILD b/community/gmic/PKGBUILD
index 2026e90a9..bb8306703 100644
--- a/community/gmic/PKGBUILD
+++ b/community/gmic/PKGBUILD
@@ -12,18 +12,26 @@ highmem=1
 pkgbase=gmic
 pkgname=(gmic zart gimp-plugin-gmic krita-plugin-gmic)
 pkgver=2.4.1
-pkgrel=1
+pkgrel=2
 arch=(x86_64)
 url="http://gmic.eu/"
 license=(custom:CeCILL)
 makedepends=(gimp qt5-base fftw openexr opencv git)
-source=(https://gmic.eu/files/source/gmic_$pkgver.tar.gz)
-sha256sums=('446b465d2ff7314add634115f6bffecd136ad96759eb92f76c03f231f44188d6')
+source=(https://gmic.eu/files/source/gmic_$pkgver.tar.gz gmic-opencv4.patch zart-opencv4.patch)
+sha256sums=('446b465d2ff7314add634115f6bffecd136ad96759eb92f76c03f231f44188d6'
+            '1ffb4f8952be152ba2956a50ff6c39b078e547a4d3386cc2f34549124aefbed3'
+            '182c6723708302a8cee92bfb45a40ff09b8903c649ce856d0d8cd10aab0ee39b')
 
 prepare() {
   sed -e 's|/etc/bash_completion.d|/usr/share/bash-completion/completions|g' -i gmic-$pkgver/src/Makefile
 # fix overlinking
-  sed -e 's/pkg-config opencv --libs ||//' -e 's/-lopencv_highgui/-lopencv_videoio/' -i gmic-$pkgver/src/Makefile 
+  sed -e 's/pkg-config opencv --libs ||//' -e 's/-lopencv_highgui/-lopencv_videoio/' \
+      -e 's/pkg-config opencv/pkg-config opencv4/' -i gmic-$pkgver/src/Makefile 
+# fix build with openCV 4.0
+  cd gmic-$pkgver/src
+  patch -p1 -i "$srcdir"/gmic-opencv4.patch
+  cd ../zart
+  patch -p1 -i "$srcdir"/zart-opencv4.patch
 
   sed -i "s|-mtune=generic|${CFLAGS}|" gmic-$pkgver/src/Makefile
 }
@@ -41,7 +49,7 @@ build() {
   make  
 
   cd ../zart
-  qmake GMIC_PATH=../src GMIC_DYNAMIC_LINKING=on
+  qmake GMIC_PATH=../src GMIC_DYNAMIC_LINKING=on QMAKE_CXXFLAGS+=" -DOPENCV2_HEADERS"
   make
 }
 
diff --git a/community/gmic/gmic-opencv4.patch b/community/gmic/gmic-opencv4.patch
new file mode 100644
index 000000000..8a7b031bb
--- /dev/null
+++ b/community/gmic/gmic-opencv4.patch
@@ -0,0 +1,14 @@
+diff --git a/CImg.h b/CImg.h
+index af63bcb..c7757fc 100644
+--- a/CImg.h
++++ b/CImg.h
+@@ -414,8 +414,7 @@
+ #define _cimg_redefine_False
+ #endif
+ #include <cstddef>
+-#include "cv.h"
+-#include "highgui.h"
++#include <opencv2/videoio/videoio_c.h>
+ #endif
+ 
+ // Configure LibPNG support.
diff --git a/community/gmic/zart-opencv4.patch b/community/gmic/zart-opencv4.patch
new file mode 100644
index 000000000..cd4a2165f
--- /dev/null
+++ b/community/gmic/zart-opencv4.patch
@@ -0,0 +1,39 @@
+diff --git a/include/VideoFileSource.h b/include/VideoFileSource.h
+index 0fda14e..8c15178 100644
+--- a/include/VideoFileSource.h
++++ b/include/VideoFileSource.h
+@@ -50,6 +50,8 @@
+ #if defined(HAS_OPENCV2_HEADERS) || defined(OPENCV2_HEADERS)
+ #include <opencv2/core/core_c.h>
+ #include <opencv2/highgui/highgui_c.h>
++#include <opencv2/videoio.hpp>
++#include <opencv2/videoio/videoio_c.h>
+ #else
+ #include <cv.h>
+ #include <highgui.h>
+diff --git a/include/WebcamSource.h b/include/WebcamSource.h
+index 8c1911a..9194385 100644
+--- a/include/WebcamSource.h
++++ b/include/WebcamSource.h
+@@ -51,6 +51,8 @@
+ #if defined(HAS_OPENCV2_HEADERS) || defined(OPENCV2_HEADERS)
+ #include <opencv2/core/core_c.h>
+ #include <opencv2/highgui/highgui_c.h>
++#include <opencv2/videoio.hpp>
++#include <opencv2/videoio/videoio_c.h>
+ #else
+ #include <cv.h>
+ #include <highgui.h>
+diff --git a/zart.pro b/zart.pro
+index d98a192..ddb2d3b 100644
+--- a/zart.pro
++++ b/zart.pro
+@@ -19,7 +19,7 @@ greaterThan(QT_MAJOR_VERSION, 4): CONFIG += c++11
+ CONFIG	+= warn_on
+ QT_CONFIG -= no-pkg-config
+ CONFIG += link_pkgconfig
+-PKGCONFIG += opencv fftw3 zlib
++PKGCONFIG += opencv4 fftw3 zlib
+ # LIBS += -lfftw3_threads
+ DEFINES += cimg_use_fftw3 cimg_use_zlib
+