diff --git a/LICENSE b/LICENSE
index e7f0507..7ee29f1 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018 mkht
+Copyright (c) 2019 mkht
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index bbd426e..135076b 100644
--- a/README.md
+++ b/README.md
@@ -380,6 +380,9 @@ This is valid `package.json` sample.
 
 ----
 ## Change log
++ **1.4.5**
+  - Fixed issue that an error occurs when the `pspm install` command was executed simultaneously in multiple processes.
+  
 + **1.4.4**
   - Fixed issue that GitHub credential params are not used when downloading modules using `package.json` [#72](https://github.com/mkht/pspm/issues/72)
 
diff --git a/pspm.psd1 b/pspm.psd1
index 6db4285..272e4fc 100644
--- a/pspm.psd1
+++ b/pspm.psd1
@@ -1,6 +1,6 @@
 @{
     # Version number of this module.
-    ModuleVersion     = '1.4.4'
+    ModuleVersion     = '1.4.5'
 
     # ID used to uniquely identify this module
     GUID              = '43b54a10-c2d7-45b1-b46f-9a9da9da1c39'
@@ -15,7 +15,7 @@
     CompanyName       = ''
 
     # Copyright statement for this module
-    Copyright         = '(c) 2018 mkht. All rights reserved.'
+    Copyright         = '(c) 2019 mkht. All rights reserved.'
 
     # Description of the functionality provided by this module
     Description       = 'PowerShell Package Manager'
@@ -47,7 +47,7 @@
             # IconUri = ''
 
             # ReleaseNotes of this module
-            ReleaseNotes = 'Fixed issue that GitHub credential params are not used when downloading modules using package.json'
+            ReleaseNotes = 'Fixed issue that an error occurs when the `pspm install` command was executed simultaneously in multiple processes.'
 
         } # End of PSData hashtable