diff --git a/srcpkgs/gmsh/patches/32bitpointers.patch b/srcpkgs/gmsh/patches/32bitpointers.patch
new file mode 100644
index 00000000000..b36906a9b85
--- /dev/null
+++ b/srcpkgs/gmsh/patches/32bitpointers.patch
@@ -0,0 +1,26 @@
+https://gitlab.onelab.info/gmsh/gmsh/-/issues/2915
+diff --git a/contrib/hxt/tetMesh/src/hxt_tetRefine.c b/contrib/hxt/tetMesh/src/hxt_tetRefine.c
+index d4c23f3..ac404f3 100644
+--- a/contrib/hxt/tetMesh/src/hxt_tetRefine.c
++++ b/contrib/hxt/tetMesh/src/hxt_tetRefine.c
+@@ -297,9 +297,9 @@ static uint64_t* scanbsearch(uint64_t* array, uint64_t key, size_t num)
+  *  - startTet[maxThreads] = mesh->tetrahedra.num
+  *  - `startPt[t+1] - startPt[t]` gives how many point will be created by thread t
+  */
+-static HXTStatus balanceRefineWork(HXTMesh* mesh, uint32_t* startPt, size_t* startTet, int maxThreads)
++static HXTStatus balanceRefineWork(HXTMesh* mesh, uint32_t* startPt, uint64_t* startTet, int maxThreads)
+ {
+-  size_t* scan;
++  uint64_t* scan;
+   uint32_t ptPerThreadGoal;
+   HXT_CHECK( hxtAlignedMalloc(&scan, sizeof(size_t) * mesh->tetrahedra.num) );
+
+@@ -343,7 +343,7 @@ static HXTStatus balanceRefineWork(HXTMesh* mesh, uint32_t* startPt, size_t* sta
+
+     // we want to find i such that scan[i] = scanToFind.
+     // we do a simple binary search in the prefix scan array to find `i`
+-    size_t* pfnd = scanbsearch(scan, scanToFind, mesh->tetrahedra.num);
++    uint64_t* pfnd = scanbsearch(scan, scanToFind, mesh->tetrahedra.num);
+     startTet[threadID] = pfnd  - scan;
+     if(startTet[threadID] < mesh->tetrahedra.num)
+       startPt[threadID] = *pfnd;
diff --git a/srcpkgs/gmsh/patches/string-time.patch b/srcpkgs/gmsh/patches/string-time.patch
new file mode 100644
index 00000000000..a8f8d34f0ca
--- /dev/null
+++ b/srcpkgs/gmsh/patches/string-time.patch
@@ -0,0 +1,11 @@
+--- a/contrib/metis/GKlib/string.c
++++ b/contrib/metis/GKlib/string.c
+@@ -503,7 +503,7 @@
+ 
+   memset(&time, '\0', sizeof(time));
+   
+-  if (strptime(str, "%m/%d/%Y %H:%M:%S", &time) == NULL)
++  if (strftime(str, 21, "%m/%d/%Y %H:%M:%S", &time) == NULL)
+     return -1;
+ 
+   rtime = mktime(&time);
diff --git a/srcpkgs/gmsh/template b/srcpkgs/gmsh/template
index c3727d90e4c..52213873e05 100644
--- a/srcpkgs/gmsh/template
+++ b/srcpkgs/gmsh/template
@@ -1,7 +1,7 @@
 # Template file for 'gmsh'
 pkgname=gmsh
-version=4.8.4
-revision=2
+version=4.13.1
+revision=1
 build_style=cmake
 configure_args="-DENABLE_SYSTEM_CONTRIB=ON
  -DENABLE_HXT=$(vopt_if hxt ON OFF)
@@ -14,7 +14,7 @@ license="GPL-2.0-or-later"
 homepage="https://gmsh.info"
 changelog="http://gmsh.info/CHANGELOG.txt"
 distfiles="https://gmsh.info/src/gmsh-${version}-source.tgz"
-checksum=760dbdc072eaa3c82d066c5ba3b06eacdd3304eb2a97373fe4ada9509f0b6ace
+checksum=77972145f431726026d50596a6a44fb3c1c95c21255218d66955806b86edbe8d
 
 build_options="fltk occt hxt zipper"
 build_options_default="hxt occt"
@@ -24,7 +24,7 @@ desc_option_fltk="Enable FLTK GUI support"
 desc_option_occt="Enable OpenCASCADE support"
 desc_option_zipper="Enable zip file compression/decompression"
 
-CFLAGS="-fcommon"
+CFLAGS="-fcommon -Wimplicit-function-declaration"
 
 if [ -z "$CROSS_BUILD" ]; then
 	makedepends+=" hdf5-devel"