diff --git a/.SRCINFO b/.SRCINFO
index a59aa71cee8fe..47f18a823001f 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,8 +1,6 @@
-# Generated by mksrcinfo v8
-# Tue Jun 28 07:45:27 UTC 2016
 pkgbase = icecat
 	pkgdesc = GNU version of the Firefox browser.
-	pkgver = 38.8.0
+	pkgver = 45.5.1
 	pkgrel = 3
 	url = http://www.gnu.org/software/gnuzilla/
 	install = icecat.install
@@ -42,25 +40,24 @@ pkgbase = icecat
 	optdepends = upower: Battery API
 	options = !emptydirs
 	options = !makeflags
-	source = http://ftpmirror.gnu.org/gnuzilla/38.8.0-gnu2/icecat-38.8.0-gnu2.tar.bz2
-	source = http://ftpmirror.gnu.org/gnuzilla/38.8.0-gnu2/icecat-38.8.0-gnu2.tar.bz2.sig
+	source = http://ftpmirror.gnu.org/gnuzilla/45.5.1/icecat-45.5.1-gnu1.tar.bz2
+	source = http://ftpmirror.gnu.org/gnuzilla/45.5.1/icecat-45.5.1-gnu1.tar.bz2.sig
 	source = mozconfig
 	source = icecat.desktop
 	source = icecat-safe.desktop
 	source = vendor.js
 	source = gcc6-fix-compilation-for-IceCat.patch
 	source = firefox-gcc-6.0.patch
-	source = harfbuzz-1.1.3.patch.gz
 	source = mozilla-1228540-1.patch
-	sha256sums = 0b0a323c7e167c3d23df9c1d33d2ca2d8c5deaca3f43841f4b2a5fac7f5067f9
+	validpgpkeys = A57369A8BABC2542B5A0368C3C76EED7D7E04784
+	sha256sums = 8163e5bc53f69d9f9b0fc5e9f95fae33da8139ae0f902756751cadbaa27e6ee9
 	sha256sums = SKIP
-	sha256sums = abaecb3101c6731a2303ef6a874179f5fa9514f5d00fe5bbe3258142a1475c60
+	sha256sums = cafb2793d58f0298cf171b7f8745805cf72a1a6c1252451db5f0f630b95846c0
 	sha256sums = c44eab35f71dd3028a74632463710d674b2e8a0682e5e887535e3233a3b7bbb3
 	sha256sums = 190577ad917bccfc89a9bcafbc331521f551b6f54e190bb6216eada48dcb1303
 	sha256sums = 4b50e9aec03432e21b44d18c4c97b2630bace606b033f7d556c9d3e3eb0f4fa4
 	sha256sums = 329cf6753d29ae64a4336a8a76ee71f0d331a39132159401e4d11de65b708a07
 	sha256sums = 4d1e1ddabc9e975ed39f49e134559a29e01cd49439e358233f1ede43bf5a52bf
-	sha256sums = 5524bc65045d5f0794936f87730b122e8e6fb6260a0e41094586eb311bcdbbc9
 	sha256sums = d1ccbaf0973615c57f7893355e5cd3a89efb4e91071d0ec376e429b50cf6ed19
 
 pkgname = icecat
diff --git a/PKGBUILD b/PKGBUILD
index 469f1f2a46aa6..c6b7f15e5ce12 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -6,8 +6,8 @@
 # Contributor: Muhammad 'MJ' Jassim <UnbreakableMJ@gmail.com> 
 
 pkgname=icecat
-pkgver=38.8.0
-_pkgver=38.8.0-gnu2
+pkgver=45.5.1
+_pkgver=${pkgver}-gnu1
 _pkgverbase=${pkgver%%.*}
 pkgrel=3
 pkgdesc="GNU version of the Firefox browser."
@@ -23,9 +23,9 @@ optdepends=('networkmanager: Location detection via available WiFi networks'
             'upower: Battery API')
 options=('!emptydirs' '!makeflags')
 install=icecat.install
-source=(http://ftpmirror.gnu.org/gnuzilla/${_pkgver}/${pkgname}-${_pkgver}.tar.bz2{,.sig}
-#source=(https://ftp.gnu.org/gnu/gnuzilla/${_pkgver}/${pkgname}-${_pkgver}.tar.bz2{,.sig}      ## Main upstream download site
-#source=(https://mirrors.kernel.org/gnu/gnuzilla/${_pkgver}/${pkgname}-${_pkgver}.tar.bz2      ## Good mirror
+source=(http://ftpmirror.gnu.org/gnuzilla/${pkgver}/${pkgname}-${_pkgver}.tar.bz2{,.sig}
+#source=(https://ftp.gnu.org/gnu/gnuzilla/${pkgver}/${pkgname}-${_pkgver}.tar.bz2{,.sig}      ## Main upstream download site
+#source=(https://mirrors.kernel.org/gnu/gnuzilla/${pkgver}/${pkgname}-${_pkgver}.tar.bz2      ## Good mirror
 #source=(http://jenkins.trisquel.info/icecat/${pkgname}-${_pkgver}.tar.bz2      ## Official developer (Ruben Rodriguez) site. Probably only has developer releases.
         mozconfig
         icecat.desktop
@@ -33,18 +33,16 @@ source=(http://ftpmirror.gnu.org/gnuzilla/${_pkgver}/${pkgname}-${_pkgver}.tar.b
         vendor.js
         gcc6-fix-compilation-for-IceCat.patch
         firefox-gcc-6.0.patch
-        harfbuzz-1.1.3.patch.gz
         mozilla-1228540-1.patch)
 
-sha256sums=('0b0a323c7e167c3d23df9c1d33d2ca2d8c5deaca3f43841f4b2a5fac7f5067f9'
+sha256sums=('8163e5bc53f69d9f9b0fc5e9f95fae33da8139ae0f902756751cadbaa27e6ee9'
             'SKIP'
-            'abaecb3101c6731a2303ef6a874179f5fa9514f5d00fe5bbe3258142a1475c60'
+            'cafb2793d58f0298cf171b7f8745805cf72a1a6c1252451db5f0f630b95846c0'
             'c44eab35f71dd3028a74632463710d674b2e8a0682e5e887535e3233a3b7bbb3'
             '190577ad917bccfc89a9bcafbc331521f551b6f54e190bb6216eada48dcb1303'
             '4b50e9aec03432e21b44d18c4c97b2630bace606b033f7d556c9d3e3eb0f4fa4'
             '329cf6753d29ae64a4336a8a76ee71f0d331a39132159401e4d11de65b708a07'
             '4d1e1ddabc9e975ed39f49e134559a29e01cd49439e358233f1ede43bf5a52bf'
-            '5524bc65045d5f0794936f87730b122e8e6fb6260a0e41094586eb311bcdbbc9'
             'd1ccbaf0973615c57f7893355e5cd3a89efb4e91071d0ec376e429b50cf6ed19')
 
 validpgpkeys=(A57369A8BABC2542B5A0368C3C76EED7D7E04784) # Ruben Rodriguez (GNU IceCat releases key) <ruben@gnu.org>
@@ -61,8 +59,7 @@ prepare() {
   patch -Np1 -i $srcdir/gcc6-fix-compilation-for-IceCat.patch
   patch -Np1 -i $srcdir/firefox-gcc-6.0.patch
 
-  # Update to harfbuzz 1.1.3 (following Thunderbird in [extra])
-  patch -Np0 -i $srcdir/harfbuzz-1.1.3.patch
+  # Patch harfbuzz (following Thunderbird in [extra])
   patch -Np1 -i $srcdir/mozilla-1228540-1.patch
 
   msg2 "Starting build..."
diff --git a/harfbuzz-1.1.3.patch.gz b/harfbuzz-1.1.3.patch.gz
deleted file mode 100644
index 568a65cf56924..0000000000000
Binary files a/harfbuzz-1.1.3.patch.gz and /dev/null differ