diff --git a/appveyor.yml b/appveyor.yml
index 7947415bea34c..063c9ebf03ce6 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -29,11 +29,10 @@ init:
   - git config --global core.autocrlf input
 
 cache:
-# Cache any downloads from sourceforge because it's really unreliable
-  - i686-4.9.2-release-win32-sjlj-rt_v4-rev3.7z
-  - x86_64-4.9.2-release-win32-seh-rt_v4-rev3.7z
-  - llvm-3.7.1-i686-w64-mingw32-juliadeps-r04.7z
-  - llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r04.7z
+  - i686-5.3.0-opensuse-win32-sjlj.7z
+  - x86_64-5.3.0-opensuse-win32-seh.7z
+  - llvm-3.7.1-i686-w64-mingw32-juliadeps-r06.7z
+  - llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r06.7z
 
 build_script:
 # If there's a newer build queued for the same PR, cancel this one
diff --git a/contrib/windows/msys_build.sh b/contrib/windows/msys_build.sh
index 854b3312850d6..3c4c9b84c5ff5 100755
--- a/contrib/windows/msys_build.sh
+++ b/contrib/windows/msys_build.sh
@@ -109,18 +109,16 @@ rm -f usr/bin/libjulia-debug.dll
 
 if [ -z "$USEMSVC" ]; then
   if [ -z "`which ${CROSS_COMPILE}gcc 2>/dev/null`" -o -n "$APPVEYOR" ]; then
-    f=$ARCH-4.9.2-release-win32-$exc-rt_v4-rev3.7z
+    f=$ARCH-5.3.0-opensuse-win32-$exc.7z
     checksum_download \
         "$f" "https://bintray.com/artifact/download/tkelman/generic/$f"
     echo "Extracting $f"
     $SEVENZIP x -y $f >> get-deps.log
-    export PATH=$PWD/mingw$bits/bin:$PATH
-    # If there is a version of make.exe here, it is mingw32-make which won't work
-    rm -f mingw$bits/bin/make.exe
+    export PATH=$PWD/usr/$ARCH-w64-mingw32/sys-root/mingw/bin:$PATH
   fi
   export AR=${CROSS_COMPILE}ar
 
-  f=llvm-3.7.1-$ARCH-w64-mingw32-juliadeps-r04.7z
+  f=llvm-3.7.1-$ARCH-w64-mingw32-juliadeps-r06.7z
 else
   echo "override USEMSVC = 1" >> Make.user
   echo "override ARCH = $ARCH" >> Make.user
@@ -140,8 +138,8 @@ checksum_download \
     "$f" "https://bintray.com/artifact/download/tkelman/generic/$f"
 echo "Extracting $f"
 $SEVENZIP x -y $f >> get-deps.log
-echo 'override LLVM_CONFIG := $(JULIAHOME)/usr/tools/llvm-config.exe' >> Make.user
-echo 'override LLVM_SIZE := $(JULIAHOME)/usr/tools/llvm-size.exe' >> Make.user
+echo 'override LLVM_CONFIG := $(JULIAHOME)/usr/bin/llvm-config.exe' >> Make.user
+echo 'override LLVM_SIZE := $(JULIAHOME)/usr/bin/llvm-size.exe' >> Make.user
 
 if [ -z "`which make 2>/dev/null`" ]; then
   if [ -n "`uname | grep CYGWIN`" ]; then
diff --git a/deps/checksums/i686-4.9.2-release-win32-sjlj-rt_v4-rev3.7z/md5 b/deps/checksums/i686-4.9.2-release-win32-sjlj-rt_v4-rev3.7z/md5
deleted file mode 100644
index e297faa029d09..0000000000000
--- a/deps/checksums/i686-4.9.2-release-win32-sjlj-rt_v4-rev3.7z/md5
+++ /dev/null
@@ -1 +0,0 @@
-6217dae4a1016b37b12aeed1cc950187
diff --git a/deps/checksums/i686-4.9.2-release-win32-sjlj-rt_v4-rev3.7z/sha512 b/deps/checksums/i686-4.9.2-release-win32-sjlj-rt_v4-rev3.7z/sha512
deleted file mode 100644
index 2cc5d1523bc61..0000000000000
--- a/deps/checksums/i686-4.9.2-release-win32-sjlj-rt_v4-rev3.7z/sha512
+++ /dev/null
@@ -1 +0,0 @@
-1f38cc758725f124552285940cde6d9e072a594298a09f7a542a6cc28cb25d119d80d73918e4e9207694819825787abb6eba4a83cee5892e5acaf6350221b97f
diff --git a/deps/checksums/i686-5.3.0-opensuse-win32-sjlj.7z/md5 b/deps/checksums/i686-5.3.0-opensuse-win32-sjlj.7z/md5
new file mode 100644
index 0000000000000..bc04b445fc3b7
--- /dev/null
+++ b/deps/checksums/i686-5.3.0-opensuse-win32-sjlj.7z/md5
@@ -0,0 +1 @@
+d1910b6cfd1872de99b88759ddc72e2e
diff --git a/deps/checksums/i686-5.3.0-opensuse-win32-sjlj.7z/sha512 b/deps/checksums/i686-5.3.0-opensuse-win32-sjlj.7z/sha512
new file mode 100644
index 0000000000000..4d215bcb1a2a8
--- /dev/null
+++ b/deps/checksums/i686-5.3.0-opensuse-win32-sjlj.7z/sha512
@@ -0,0 +1 @@
+04da25abd98437392354664e6228af37ee63deddcb71367526ca3df6356d801d3ab0e47aacacb3e5d22d696d5032fa8ce321b34cfa79908e191a6c4bf2150cae
diff --git a/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r04.7z/md5 b/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r04.7z/md5
deleted file mode 100644
index 17b03f2082646..0000000000000
--- a/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r04.7z/md5
+++ /dev/null
@@ -1 +0,0 @@
-d639c06cdad6b7c55c1dbdb82e3def15
diff --git a/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r04.7z/sha512 b/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r04.7z/sha512
deleted file mode 100644
index de93e76809c83..0000000000000
--- a/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r04.7z/sha512
+++ /dev/null
@@ -1 +0,0 @@
-93785655d61d3eec63a1834669153148102171115982bfc01011a1f154192395ee7e787efc52047dc63a2887a11832ae3faccd7cf3fae4b168ffcd160786adee
diff --git a/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r06.7z/md5 b/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r06.7z/md5
new file mode 100644
index 0000000000000..ed03262ef7cc4
--- /dev/null
+++ b/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r06.7z/md5
@@ -0,0 +1 @@
+98324dd5062410e5418df8249776cf64
diff --git a/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r06.7z/sha512 b/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r06.7z/sha512
new file mode 100644
index 0000000000000..d90f621ef0a0f
--- /dev/null
+++ b/deps/checksums/llvm-3.7.1-i686-w64-mingw32-juliadeps-r06.7z/sha512
@@ -0,0 +1 @@
+a3d1cd86f6e032d0a88c84058c6dafa0ed12286d9cc8edad084f670a3d5e299228214409fa716e53e58bc4d47742a37996652a1907d8e60cf0e9c22721a83574
diff --git a/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r04.7z/md5 b/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r04.7z/md5
deleted file mode 100644
index df47ab34abf50..0000000000000
--- a/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r04.7z/md5
+++ /dev/null
@@ -1 +0,0 @@
-f27bdc73c67ce670b30a2494dcf82e58
diff --git a/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r04.7z/sha512 b/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r04.7z/sha512
deleted file mode 100644
index c6faf62f87059..0000000000000
--- a/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r04.7z/sha512
+++ /dev/null
@@ -1 +0,0 @@
-a61e0564816427be4c8d5005077354f01b9c4cb1c0abb1c6ccedf90b44654be4350edabe9a0c5fcd52833f1c4caa6aa286713879bec2eae96cb848c5422113c1
diff --git a/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r06.7z/md5 b/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r06.7z/md5
new file mode 100644
index 0000000000000..c8667da723e95
--- /dev/null
+++ b/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r06.7z/md5
@@ -0,0 +1 @@
+b9bebde989cc5b2ee0655d9be22975ae
diff --git a/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r06.7z/sha512 b/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r06.7z/sha512
new file mode 100644
index 0000000000000..bceb1e3f79ac6
--- /dev/null
+++ b/deps/checksums/llvm-3.7.1-x86_64-w64-mingw32-juliadeps-r06.7z/sha512
@@ -0,0 +1 @@
+f985ab65d9c77dbe0ef31f7fa4961a9b0a8c64bc1c3dc033090be2be1d2e91e6f35dceb8abcd13369e9a4e2f243add8e1d4ebaa1ff8ea74db32824bbd8c8618a
diff --git a/deps/checksums/x86_64-4.9.2-release-win32-seh-rt_v4-rev3.7z/md5 b/deps/checksums/x86_64-4.9.2-release-win32-seh-rt_v4-rev3.7z/md5
deleted file mode 100644
index c574a25b87112..0000000000000
--- a/deps/checksums/x86_64-4.9.2-release-win32-seh-rt_v4-rev3.7z/md5
+++ /dev/null
@@ -1 +0,0 @@
-b138576c92c425e8fa171a9d98e13b86
diff --git a/deps/checksums/x86_64-4.9.2-release-win32-seh-rt_v4-rev3.7z/sha512 b/deps/checksums/x86_64-4.9.2-release-win32-seh-rt_v4-rev3.7z/sha512
deleted file mode 100644
index ed37b9bd96e51..0000000000000
--- a/deps/checksums/x86_64-4.9.2-release-win32-seh-rt_v4-rev3.7z/sha512
+++ /dev/null
@@ -1 +0,0 @@
-50dcb3aaab3e53d5ff4561079272daf473bacc8d7a2a3720e7c594ae6e402123cb3cc6f3eabaf67df8d94fa5c01bb3e45b5bb1bc7cbb87cd2beb6b5664e02072
diff --git a/deps/checksums/x86_64-5.3.0-opensuse-win32-seh.7z/md5 b/deps/checksums/x86_64-5.3.0-opensuse-win32-seh.7z/md5
new file mode 100644
index 0000000000000..646f4b24f50bc
--- /dev/null
+++ b/deps/checksums/x86_64-5.3.0-opensuse-win32-seh.7z/md5
@@ -0,0 +1 @@
+1d895dab2e6afc6e0dfe14fbe4291de4
diff --git a/deps/checksums/x86_64-5.3.0-opensuse-win32-seh.7z/sha512 b/deps/checksums/x86_64-5.3.0-opensuse-win32-seh.7z/sha512
new file mode 100644
index 0000000000000..0585f2a43280b
--- /dev/null
+++ b/deps/checksums/x86_64-5.3.0-opensuse-win32-seh.7z/sha512
@@ -0,0 +1 @@
+cb06c7b217f71556d3ec459a0ae2529e18f33787b0d4392f87d5f33aae0a3e503af0b0e0180edcc34580436f12481e983b018341c83bff29aa4381724972ecc1