diff --git a/.gitignore b/.gitignore
index 276ded4..e8f38b3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,4 @@
 /libimagequant-2.14.0.tar.gz
 /libimagequant-2.14.1.tar.gz
 /libimagequant-2.15.0.tar.gz
+/libimagequant-2.15.1.tar.gz
diff --git a/5d4c07aa46e58d41146df5bed19c44c6f23c3349.patch b/5d4c07aa46e58d41146df5bed19c44c6f23c3349.patch
deleted file mode 100644
index ab674f5..0000000
--- a/5d4c07aa46e58d41146df5bed19c44c6f23c3349.patch
+++ /dev/null
@@ -1,24 +0,0 @@
-From aaf1fc320b1109c194eb094a26a9d4b67326d4a5 Mon Sep 17 00:00:00 2001
-From: Markus <zyxar@users.noreply.github.com>
-Date: Tue, 11 May 2021 23:21:47 +0800
-Subject: [PATCH] Fixes Makefile for imagequant.pc
-
-removing extra `@`s in produced imagequant.pc which was introduced for cmake building
-closes #54
----
- Makefile | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/Makefile b/Makefile
-index 8eeea63..3210d54 100644
---- a/Makefile
-+++ b/Makefile
-@@ -134,7 +134,7 @@ ifeq ($(filter %clean %distclean, $(MAKECMDGOALS)), )
- endif
- 
- $(PKGCONFIG): config.mk
--	sed 's|PREFIX|$(PREFIX)|;s|VERSION|$(VERSION)|' < imagequant.pc.in > $(PKGCONFIG)
-+	sed 's|@PREFIX@|$(PREFIX)|;s|@VERSION@|$(VERSION)|' < imagequant.pc.in > $(PKGCONFIG)
- 
- .PHONY: all static shared clean dist distclean dll java cargo
- .DELETE_ON_ERROR:
diff --git a/libimagequant.spec b/libimagequant.spec
index b3f1d42..6c27474 100644
--- a/libimagequant.spec
+++ b/libimagequant.spec
@@ -1,5 +1,5 @@
 Name:           libimagequant
-Version:        2.15.0
+Version:        2.15.1
 Release:        1%{?dist}
 Summary:        Palette quantization library
 
@@ -9,8 +9,6 @@ Source0:        %{url}/archive/%{version}/%{name}-%{version}.tar.gz
 
 # Fix shared library permissions
 Patch0:         libimagequant_solibperm.patch
-# Backport fix for pkgconfig file generation
-Patch1:         https://github.com/ImageOptim/libimagequant/commit/5d4c07aa46e58d41146df5bed19c44c6f23c3349.patch
 
 BuildRequires:  gcc
 BuildRequires:  make
@@ -60,6 +58,9 @@ rm -f %{buildroot}%{_libdir}/%{name}.a
 
 
 %changelog
+* Sat May 15 2021 Sandro Mani <manisandro@gmail.com> - 2.15.1-1
+- Update to 2.15.1
+
 * Wed May 12 2021 Sandro Mani <manisandro@gmail.com> - 2.15.0-1
 - Update to 2.15.0
 
diff --git a/libimagequant_solibperm.patch b/libimagequant_solibperm.patch
index 4a1d7d2..2ba0f6c 100644
--- a/libimagequant_solibperm.patch
+++ b/libimagequant_solibperm.patch
@@ -1,6 +1,6 @@
-diff -rupN --no-dereference libimagequant-2.14.1/Makefile libimagequant-2.14.1-new/Makefile
---- libimagequant-2.14.1/Makefile	2021-02-28 19:12:44.000000000 +0100
-+++ libimagequant-2.14.1-new/Makefile	2021-03-03 00:00:30.634870628 +0100
+diff -rupN --no-dereference libimagequant-2.15.1/Makefile libimagequant-2.15.1-new/Makefile
+--- libimagequant-2.15.1/Makefile	2021-05-13 11:29:53.000000000 +0200
++++ libimagequant-2.15.1-new/Makefile	2021-05-15 10:39:30.352021349 +0200
 @@ -115,7 +115,7 @@ install: all $(PKGCONFIG)
  	install -d $(DESTDIR)$(PKGCONFIGDIR)
  	install -d $(DESTDIR)$(INCLUDEDIR)
diff --git a/sources b/sources
index d8c6af8..503c2e2 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (libimagequant-2.15.0.tar.gz) = b856daaf79dd748ed3bb4cdc432dcffebf6678f8dffd6b4b0e79b96ec9c64ebf19597de35cf56ed47d3202947f3f5f208745c2c2c92fadf6c5b62f17e61b3f13
+SHA512 (libimagequant-2.15.1.tar.gz) = 56bc8b73859908774ce0a218cfbec81bfb8432c02ddce83880990b5f5ac89ac253ae64ecde43a9664aab3ac69d309bb9ef8ba2201be6c93aacb731b3214ff4b8