diff --git a/0001-Add-memory-include-required-for-unique_ptr.patch b/0001-Add-memory-include-required-for-unique_ptr.patch
deleted file mode 100644
index a2163ec..0000000
--- a/0001-Add-memory-include-required-for-unique_ptr.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-From 0cbe77ac110d3335cafdd85196780e02d02753db Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
-Date: Sat, 21 May 2022 12:37:06 +0200
-Subject: [PATCH] Add <memory> include required for unique_ptr
-
-Do no rely on <memory> to be included by some other header file.
-Fixes build failures with GCC 12.1.0.
-
-Fixes #583.
----
- include/minizinc/utils.hh | 1 +
- 1 file changed, 1 insertion(+)
-
-diff --git a/include/minizinc/utils.hh b/include/minizinc/utils.hh
-index 209869cb..0deedaed 100644
---- a/include/minizinc/utils.hh
-+++ b/include/minizinc/utils.hh
-@@ -21,6 +21,7 @@
- #include <iomanip>
- #include <iostream>
- #include <limits>
-+#include <memory>
- #include <ratio>
- #include <sstream>
- #include <string>
--- 
-2.36.0
-
diff --git a/0001-Fix-missing-return-in-non-void-function.patch b/0001-Fix-missing-return-in-non-void-function.patch
deleted file mode 100644
index f04d582..0000000
--- a/0001-Fix-missing-return-in-non-void-function.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-From 0371e4b46758aa90eb322fc018450b307e65c9da Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
-Date: Tue, 26 Apr 2022 23:34:06 +0200
-Subject: [PATCH] Fix missing return in non-void function
-
-Not returning in a non-void function causes undefined-behavior.
-
-An enum in C++ is not closed, but may have any value of its underlying
-type (in this case int).
----
- lib/model.cpp | 1 +
- 1 file changed, 1 insertion(+)
-
-diff --git a/lib/model.cpp b/lib/model.cpp
-index ba30d4c8..b66d05fe 100644
---- a/lib/model.cpp
-+++ b/lib/model.cpp
-@@ -167,6 +167,7 @@ bool can_increment_type(const Type& t, PossibleBaseTypes pbt) {
-     case PBT_I:
-       return false;
-   }
-+  throw InternalError("Invalid BaseType");
- }
- void increment_type(Type& t, PossibleBaseTypes pbt) {
-   assert(pbt != PBT_I);
--- 
-2.35.3
-
diff --git a/libminizinc-2.6.3.tar.gz b/libminizinc-2.6.3.tar.gz
deleted file mode 100644
index 2043375..0000000
--- a/libminizinc-2.6.3.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:740884d4eb8e7acf366efaad82efa0ca46dc4342afa5a6ecc1d749fcc4f96dd4
-size 12967548
diff --git a/libminizinc-2.6.4.tar.gz b/libminizinc-2.6.4.tar.gz
new file mode 100644
index 0000000..964a7a2
--- /dev/null
+++ b/libminizinc-2.6.4.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f1f5adba23c749ddfdb2420e797d7ff46e72b843850529978f867583dbc599ca
+size 12975175
diff --git a/libminizinc.changes b/libminizinc.changes
index 0eb0cd9..057e1c5 100644
--- a/libminizinc.changes
+++ b/libminizinc.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Sat Jul 16 21:50:27 UTC 2022 - Stefan Brüns <stefan.bruens@rwth-aachen.de>
+
+- Update to version 2.6.4
+  https://github.com/MiniZinc/libminizinc/blob/2.6.4/changes.rst
+- Drop upstream patches:
+  * 0001-Fix-missing-return-in-non-void-function.patch
+  * 0001-Add-memory-include-required-for-unique_ptr.patch
+
 -------------------------------------------------------------------
 Sat May 21 10:47:50 UTC 2022 - Stefan Brüns <stefan.bruens@rwth-aachen.de>
 
diff --git a/libminizinc.spec b/libminizinc.spec
index e2a0c76..6652f39 100644
--- a/libminizinc.spec
+++ b/libminizinc.spec
@@ -17,28 +17,24 @@
 
 
 Name:           libminizinc
-Version:        2.6.3
+Version:        2.6.4
 Release:        0
 Summary:        A high-level constraint modelling language
 Group:          Productivity/Scientific/Math
 License:        MPL-2.0
 URL:            https://www.minizinc.org/
 Source:         https://github.com/MiniZinc/libminizinc/archive/refs/tags/%{version}.tar.gz#/%{name}-%{version}.tar.gz
-# PATCH-FIX-UPSTREAM
-Patch0:         0001-Fix-missing-return-in-non-void-function.patch
-# PATCH-FIX-UPSTREAM
-Patch1:         0001-Add-memory-include-required-for-unique_ptr.patch
 BuildRequires:  cmake >= 3.4.0
 BuildRequires:  gcc-c++
 BuildRequires:  pkgconfig(mpfr)
 BuildRequires:  gecode-devel
-Recommends:     gecode-minizinc
 
 %description
 MiniZinc is a free and open-source constraint modeling language.
 
 %package -n minizinc
 Summary:        A high-level constraint modelling language
+Recommends:     gecode-minizinc
 
 %description -n minizinc
 You can use MiniZinc to model constraint satisfaction and optimisation