diff --git a/ChangeLog b/ChangeLog
index 8a90a6766f..8ac73d6169 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,30 @@
+Aug 12, 2024: version 7.8.1
+
+    * GraphBLAS 9.3.1: bug fix in creation of JIT package
+    * SuiteSparse_config, Example: modified to reflect the release of
+        GraphBLAS 9.3.1
+    * Package versions in this release: (* denotes a new version)
+        SuiteSparse_config 7.8.1    *
+        AMD 3.3.3
+        BTF 2.3.2
+        CAMD 3.3.3
+        CCOLAMD 3.3.4
+        CHOLMOD 5.3.0
+        COLAMD 3.3.4
+        CSparse 4.3.2
+        CXSparse 4.4.1
+        Example 1.8.1               *
+        GraphBLAS 9.3.1             *
+        KLU 2.3.4
+        LDL 3.3.2
+        LAGraph 1.1.3
+        SuiteSparse_Mongoose 3.3.4
+        ParU 0.2.0
+        RBio 4.3.3
+        SPEX 3.2.0
+        SPQR 4.3.4
+        UMFPACK 6.3.4
+
 Aug 2, 2024: version 7.8.0
 
     * ParU 0.2.0: many changes; nearing a stable release.
diff --git a/Example/CMakeLists.txt b/Example/CMakeLists.txt
index b1bbab357b..5114449843 100644
--- a/Example/CMakeLists.txt
+++ b/Example/CMakeLists.txt
@@ -53,10 +53,10 @@ message ( STATUS "MY prefix path:    ${CMAKE_PREFIX_PATH}" )
 #-------------------------------------------------------------------------------
 
 # cmake inserts the date and version number into Include/my.h:
-set ( MY_DATE "Aug 2, 2024" )
+set ( MY_DATE "Aug 12, 2024" )
 set ( MY_VERSION_MAJOR 1 )
 set ( MY_VERSION_MINOR 8 )
-set ( MY_VERSION_PATCH 0 )
+set ( MY_VERSION_PATCH 1 )
 
 message ( STATUS "Building MY library version: v"
     ${MY_VERSION_MAJOR}.
@@ -87,7 +87,7 @@ project ( my
 #-------------------------------------------------------------------------------
 
 # look for all SuiteSparse packages:
-find_package ( SuiteSparse_config 7.8.0 REQUIRED )
+find_package ( SuiteSparse_config 7.8.1 REQUIRED )
 find_package ( AMD 3.3.3 REQUIRED )
 find_package ( BTF 2.3.2 REQUIRED )
 find_package ( CAMD 3.3.3 REQUIRED )
@@ -95,7 +95,7 @@ find_package ( CCOLAMD 3.3.4 REQUIRED )
 find_package ( CHOLMOD 5.3.0 REQUIRED )
 find_package ( COLAMD 3.3.4 REQUIRED )
 find_package ( CXSparse 4.4.1 REQUIRED )
-find_package ( GraphBLAS 9.3.0 )
+find_package ( GraphBLAS 9.3.1 )
 find_package ( KLU 2.3.4 REQUIRED )
 find_package ( KLU_CHOLMOD 2.3.4 REQUIRED )
 find_package ( LDL 3.3.2 REQUIRED )
diff --git a/Example/Include/my.h b/Example/Include/my.h
index 7889add2a0..50def62c35 100644
--- a/Example/Include/my.h
+++ b/Example/Include/my.h
@@ -11,10 +11,10 @@
 // file, since it is constructed from Config/my.h.in by cmake.
 
 // version and date for example user library
-#define MY_DATE "Aug 2, 2024"
+#define MY_DATE "Aug 12, 2024"
 #define MY_MAJOR_VERSION 1
 #define MY_MINOR_VERSION 8
-#define MY_PATCH_VERSION 0
+#define MY_PATCH_VERSION 1
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/Example/Include/my_internal.h b/Example/Include/my_internal.h
index 6387588838..6a9f1fee4f 100644
--- a/Example/Include/my_internal.h
+++ b/Example/Include/my_internal.h
@@ -14,8 +14,8 @@
 
 // SuiteSparse include files for C/C++:
 #include "SuiteSparse_config.h"
-#if !defined (SUITESPARSE__VERSION) || SUITESPARSE__VERSION < SUITESPARSE__VERCODE(7,8,0)
-#error "This library requires SuiteSparse_config 7.8.0 or later"
+#if !defined (SUITESPARSE__VERSION) || SUITESPARSE__VERSION < SUITESPARSE__VERCODE(7,8,1)
+#error "This library requires SuiteSparse_config 7.8.1 or later"
 #endif
 
 #include "amd.h"
@@ -56,8 +56,8 @@
 #if ! defined (NO_GRAPHBLAS)
     #include "GraphBLAS.h"
     #if !defined ( GxB_SUITESPARSE_GRAPHBLAS ) || \
-        GxB_IMPLEMENTATION < GxB_VERSION (9,3,0)
-    #error "This library requires SuiteSparse:GraphBLAS 9.3.0 or later"
+        GxB_IMPLEMENTATION < GxB_VERSION (9,3,1)
+    #error "This library requires SuiteSparse:GraphBLAS 9.3.1 or later"
     #endif
 #endif
 
diff --git a/GraphBLAS/Doc/ChangeLog b/GraphBLAS/Doc/ChangeLog
index 67d7cac6cf..a3bcae2af7 100644
--- a/GraphBLAS/Doc/ChangeLog
+++ b/GraphBLAS/Doc/ChangeLog
@@ -1,3 +1,8 @@
+Aug 12, 2024: version 9.3.1
+
+    * (56) bug fix:  wrong type for fgetc return value in JITpackage; leads
+        to infinite loop on some systems when building GraphBLAS.
+
 Aug 2, 2024: version 9.3.0
 
     * code restructuring:  Source folder split into many subfolders, and
diff --git a/GraphBLAS/Doc/GraphBLAS_UserGuide.pdf b/GraphBLAS/Doc/GraphBLAS_UserGuide.pdf
index 4871289bbd..e7f89b8387 100644
Binary files a/GraphBLAS/Doc/GraphBLAS_UserGuide.pdf and b/GraphBLAS/Doc/GraphBLAS_UserGuide.pdf differ
diff --git a/GraphBLAS/Doc/GraphBLAS_UserGuide.tex b/GraphBLAS/Doc/GraphBLAS_UserGuide.tex
index 4128a5e82a..fa915948b6 100644
--- a/GraphBLAS/Doc/GraphBLAS_UserGuide.tex
+++ b/GraphBLAS/Doc/GraphBLAS_UserGuide.tex
@@ -14492,6 +14492,13 @@ \section{Release Notes}
 
 \begin{itemize}
 
+\item Aug 12, 2024: version 9.3.1
+
+    \begin{itemize}
+    \item (56) bug fix:  wrong type for fgetc return value in JITpackage; leads
+        to infinite loop on some systems when building GraphBLAS.
+    \end{itemize}
+
 \item Aug 2, 2024: version 9.3.0
 
     \begin{itemize}
diff --git a/GraphBLAS/Doc/GraphBLAS_version.tex b/GraphBLAS/Doc/GraphBLAS_version.tex
index a0cfac3bf4..43025c5439 100644
--- a/GraphBLAS/Doc/GraphBLAS_version.tex
+++ b/GraphBLAS/Doc/GraphBLAS_version.tex
@@ -1,5 +1,5 @@
 % version of SuiteSparse:GraphBLAS
 \date{VERSION
-9.3.0,
-Aug 2, 2024}
+9.3.1,
+Aug 12, 2024}
 
diff --git a/GraphBLAS/Include/GraphBLAS.h b/GraphBLAS/Include/GraphBLAS.h
index 6803295e54..c15defdec9 100644
--- a/GraphBLAS/Include/GraphBLAS.h
+++ b/GraphBLAS/Include/GraphBLAS.h
@@ -1,4 +1,4 @@
-// SuiteSparse:GraphBLAS 9.3.0
+// SuiteSparse:GraphBLAS 9.3.1
 //------------------------------------------------------------------------------
 // GraphBLAS.h: definitions for the GraphBLAS package
 //------------------------------------------------------------------------------
@@ -275,10 +275,10 @@
 
 // The version of this implementation, and the GraphBLAS API version:
 #define GxB_IMPLEMENTATION_NAME "SuiteSparse:GraphBLAS"
-#define GxB_IMPLEMENTATION_DATE "Aug 2, 2024"
+#define GxB_IMPLEMENTATION_DATE "Aug 12, 2024"
 #define GxB_IMPLEMENTATION_MAJOR 9
 #define GxB_IMPLEMENTATION_MINOR 3
-#define GxB_IMPLEMENTATION_SUB   0
+#define GxB_IMPLEMENTATION_SUB   1
 #define GxB_SPEC_DATE "Dec 22, 2023"
 #define GxB_SPEC_MAJOR 2
 #define GxB_SPEC_MINOR 1
diff --git a/GraphBLAS/JITpackage/Source/grb_jitpackage.c b/GraphBLAS/JITpackage/Source/grb_jitpackage.c
index 82ea371c83..b8304998b9 100644
--- a/GraphBLAS/JITpackage/Source/grb_jitpackage.c
+++ b/GraphBLAS/JITpackage/Source/grb_jitpackage.c
@@ -142,12 +142,14 @@ int main (int argc, char **argv)
         OK (fr != NULL) ;
 
         // get number of lines in file
-        char ch;
+        int ch;
         do
         {
             ch = fgetc (fr);
             if (ch == '\n')
+            {
                 nfiles++;
+            }
         } while (ch != EOF);
 
         // read file list from response file
diff --git a/GraphBLAS/README.md b/GraphBLAS/README.md
index 13aa3fe882..1be913fb8e 100644
--- a/GraphBLAS/README.md
+++ b/GraphBLAS/README.md
@@ -4,7 +4,7 @@ SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2024, All Rights Reserved.
 
 SPDX-License-Identifier: Apache-2.0
 
-VERSION 9.3.0, Aug 2, 2024
+VERSION 9.3.1, Aug 12, 2024
 
 SuiteSparse:GraphBLAS is a complete implementation of the GraphBLAS standard,
 which defines a set of sparse matrix operations on an extended algebra of
diff --git a/GraphBLAS/cmake_modules/GraphBLAS_version.cmake b/GraphBLAS/cmake_modules/GraphBLAS_version.cmake
index 580c5221e8..a9a468e332 100644
--- a/GraphBLAS/cmake_modules/GraphBLAS_version.cmake
+++ b/GraphBLAS/cmake_modules/GraphBLAS_version.cmake
@@ -8,10 +8,10 @@
 #-------------------------------------------------------------------------------
 
 # version of SuiteSparse:GraphBLAS
-set ( GraphBLAS_DATE "Aug 2, 2024" )
+set ( GraphBLAS_DATE "Aug 12, 2024" )
 set ( GraphBLAS_VERSION_MAJOR 9 CACHE STRING "" FORCE )
 set ( GraphBLAS_VERSION_MINOR 3 CACHE STRING "" FORCE )
-set ( GraphBLAS_VERSION_SUB   0 CACHE STRING "" FORCE )
+set ( GraphBLAS_VERSION_SUB   1 CACHE STRING "" FORCE )
 
 # GraphBLAS C API Specification version, at graphblas.org
 set ( GraphBLAS_API_DATE "Dec 22, 2023" )
diff --git a/README.md b/README.md
index 26862e0208..4401c34ca4 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 SuiteSparse:  A Suite of Sparse matrix packages at http://suitesparse.com
 -----------------------------------------------------------------------------
 
-Aug 2, 2024, SuiteSparse VERSION 7.8.0
+Aug 12, 2024, SuiteSparse VERSION 7.8.1
 
 SuiteSparse is a set of sparse-matrix-related packages written or co-authored
 by Tim Davis, available at https://github.com/DrTimothyAldenDavis/SuiteSparse .
diff --git a/SuiteSparse_config/CMakeLists.txt b/SuiteSparse_config/CMakeLists.txt
index fcdcd3b431..55a627fee2 100644
--- a/SuiteSparse_config/CMakeLists.txt
+++ b/SuiteSparse_config/CMakeLists.txt
@@ -15,10 +15,10 @@
 cmake_minimum_required ( VERSION 3.22 )
 
 # version of both SuiteSparse and SuiteSparse_config
-set ( SUITESPARSE_DATE "Aug 2, 2024" )
+set ( SUITESPARSE_DATE "Aug 12, 2024" )
 set ( SUITESPARSE_VERSION_MAJOR 7 )
 set ( SUITESPARSE_VERSION_MINOR 8 )
-set ( SUITESPARSE_VERSION_SUB   0 )
+set ( SUITESPARSE_VERSION_SUB   1 )
 set ( SUITESPARSE_CONFIG_VERSION_MAJOR ${SUITESPARSE_VERSION_MAJOR} CACHE STRING "" FORCE )
 set ( SUITESPARSE_CONFIG_VERSION_MINOR ${SUITESPARSE_VERSION_MINOR} CACHE STRING "" FORCE )
 set ( SUITESPARSE_CONFIG_VERSION_PATCH ${SUITESPARSE_VERSION_SUB} CACHE STRING "" FORCE )
diff --git a/SuiteSparse_config/SuiteSparse_config.h b/SuiteSparse_config/SuiteSparse_config.h
index 18961a388a..dec7019cc8 100644
--- a/SuiteSparse_config/SuiteSparse_config.h
+++ b/SuiteSparse_config/SuiteSparse_config.h
@@ -434,10 +434,10 @@ int SuiteSparse_version     // returns SUITESPARSE_VERSION
 
 #define SUITESPARSE_HAS_VERSION_FUNCTION
 
-#define SUITESPARSE_DATE "Aug 2, 2024"
+#define SUITESPARSE_DATE "Aug 12, 2024"
 #define SUITESPARSE_MAIN_VERSION    7
 #define SUITESPARSE_SUB_VERSION     8
-#define SUITESPARSE_SUBSUB_VERSION  0
+#define SUITESPARSE_SUBSUB_VERSION  1
 
 // version format x.y
 #define SUITESPARSE_VER_CODE(main,sub) ((main) * 1000 + (sub))
@@ -446,7 +446,7 @@ int SuiteSparse_version     // returns SUITESPARSE_VERSION
 // version format x.y.z
 #define SUITESPARSE__VERCODE(main,sub,patch) \
     (((main)*1000ULL + (sub))*1000ULL + (patch))
-#define SUITESPARSE__VERSION SUITESPARSE__VERCODE(7,8,0)
+#define SUITESPARSE__VERSION SUITESPARSE__VERCODE(7,8,1)
 
 //==============================================================================
 // SuiteSparse interface to the BLAS and LAPACK libraries