diff --git a/glpk-4.63.tar.gz b/glpk-4.63.tar.gz
deleted file mode 100644
index 2500531..0000000
--- a/glpk-4.63.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:914d27f1a51c2bf4a51f1bd4a507f875fcca99db7b219380b836a25b29b3e7f6
-size 4131787
diff --git a/glpk-4.63.tar.gz.sig b/glpk-4.63.tar.gz.sig
deleted file mode 100644
index 1885a26..0000000
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diff --git a/glpk-4.64.tar.gz b/glpk-4.64.tar.gz
new file mode 100644
index 0000000..be7de2e
--- /dev/null
+++ b/glpk-4.64.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:539267f40ea3e09c3b76a31c8747f559e8a097ec0cda8f1a3778eec3e4c3cc24
+size 4143259
diff --git a/glpk-4.64.tar.gz.sig b/glpk-4.64.tar.gz.sig
new file mode 100644
index 0000000..0c71cb6
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diff --git a/glpk.changes b/glpk.changes
index c62e0ef..2d5b14a 100644
--- a/glpk.changes
+++ b/glpk.changes
@@ -1,3 +1,21 @@
+-------------------------------------------------------------------
+Mon Dec 11 20:52:49 UTC 2017 - astieger@suse.com
+
+- update to 4.64:
+  * The dual simplex solver routine was changed to perform more
+    aggressive perturbation to prevent dual degeneracy and avoid
+    stalling even if the current dual basic solution is strongly
+    feasible (mainly if the objective is zero)
+  * The exact simplex solver routine was changed to perform
+    terminal output according to the verbosity level (specified by
+    the control parameter smcp.msg_lev)
+  * A minor bug (related to MS Windows version) was fixed
+  * An example model (Graceful Tree Labeling Problem) in MathProg
+    was added
+  * Three example models (Power plant LP scheduler, Neumann CA
+    grid emulator generator) in MathProg and one in Cplex LP format
+    were added
+
 -------------------------------------------------------------------
 Mon Jul 31 13:31:32 UTC 2017 - mpluskal@suse.com
 
diff --git a/glpk.spec b/glpk.spec
index ceff3bc..c39e7c2 100644
--- a/glpk.spec
+++ b/glpk.spec
@@ -18,7 +18,7 @@
 
 %define lname   libglpk40
 Name:           glpk
-Version:        4.63
+Version:        4.64
 Release:        0
 Summary:        GNU Linear Programming Kit
 License:        GPL-3.0