diff --git a/depends/builders/darwin.mk b/depends/builders/darwin.mk
index 0028d3f6f..f9b066fcf 100644
--- a/depends/builders/darwin.mk
+++ b/depends/builders/darwin.mk
@@ -1,5 +1,5 @@
-build_darwin_CC = gcc-5
-build_darwin_CXX = g++-5
+build_darwin_CC = gcc-6
+build_darwin_CXX = g++-6
 build_darwin_AR: = $(shell xcrun -f ar)
 build_darwin_RANLIB: = $(shell xcrun -f ranlib)
 build_darwin_STRIP: = $(shell xcrun -f strip)
@@ -10,8 +10,8 @@ build_darwin_SHA256SUM = shasum -a 256
 build_darwin_DOWNLOAD = curl --connect-timeout $(DOWNLOAD_CONNECT_TIMEOUT) --retry $(DOWNLOAD_RETRIES) -L -f -o
 
 #darwin host on darwin builder. overrides darwin host preferences.
-darwin_CC= gcc-5
-darwin_CXX= g++-5
+darwin_CC= gcc-6
+darwin_CXX= g++-6
 darwin_AR:=$(shell xcrun -f ar)
 darwin_RANLIB:=$(shell xcrun -f ranlib)
 darwin_STRIP:=$(shell xcrun -f strip)