diff --git a/src/main_gpumd/main.cu b/src/main_gpumd/main.cu
index de2996d5d..ebc45469b 100644
--- a/src/main_gpumd/main.cu
+++ b/src/main_gpumd/main.cu
@@ -59,7 +59,7 @@ void print_welcome_information(void)
   printf("***************************************************************\n");
   printf("*                 Welcome to use GPUMD                        *\n");
   printf("*     (Graphics Processing Units Molecular Dynamics)          *\n");
-  printf("*                     Version 3.8                             *\n");
+  printf("*                     Version 3.9                             *\n");
   printf("*              This is the gpumd executable                   *\n");
   printf("***************************************************************\n");
   printf("\n");
diff --git a/src/main_nep/main.cu b/src/main_nep/main.cu
index 89de6f2b0..7885c1b02 100644
--- a/src/main_nep/main.cu
+++ b/src/main_nep/main.cu
@@ -70,7 +70,7 @@ void print_welcome_information(void)
   printf("***************************************************************\n");
   printf("*                 Welcome to use GPUMD                        *\n");
   printf("*    (Graphics Processing Units Molecular Dynamics)           *\n");
-  printf("*                     Version 3.8                             *\n");
+  printf("*                     Version 3.9                             *\n");
   printf("*              This is the nep executable                     *\n");
   printf("***************************************************************\n");
   printf("\n");
diff --git a/src/measure/dump_netcdf.cu b/src/measure/dump_netcdf.cu
index 0c0513b64..f1d1d6aae 100644
--- a/src/measure/dump_netcdf.cu
+++ b/src/measure/dump_netcdf.cu
@@ -41,7 +41,7 @@ http://ambermd.org/netcdf/nctraj.xhtml
 #include <unistd.h>
 
 const int FILE_NAME_LENGTH = 200;
-#define GPUMD_VERSION "3.8"
+#define GPUMD_VERSION "3.9"
 
 /* Handle errors by printing an error message and exiting with a
  * non-zero status. */