diff --git a/docs/doxygen-dev/Doxyfile b/docs/doxygen-dev/Doxyfile
index 66497c563c8fc2781c2f3e014ebe0e56b16190e3..a7617b7af74a18183147d795a1721d4f93787ee9 100755
--- a/docs/doxygen-dev/Doxyfile
+++ b/docs/doxygen-dev/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Autopsy Developer Documentation"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER = 4.20.0
+PROJECT_NUMBER = 4.21.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
@@ -1025,7 +1025,7 @@ GENERATE_HTML          = YES
 # The default directory is: html.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_OUTPUT = 4.20.0
+HTML_OUTPUT = 4.21.0
 
 # The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
 # generated HTML page (for example: .htm, .php, .asp).
diff --git a/docs/doxygen-user/Doxyfile b/docs/doxygen-user/Doxyfile
index e836298f109e5c7d9a549254fd666fb1869af56b..3a09612a74da27b0ef15b99e60e178451d7590ab 100644
--- a/docs/doxygen-user/Doxyfile
+++ b/docs/doxygen-user/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Autopsy User Documentation"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER = 4.20.0
+PROJECT_NUMBER = 4.21.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
@@ -1025,7 +1025,7 @@ GENERATE_HTML          = YES
 # The default directory is: html.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_OUTPUT = 4.20.0
+HTML_OUTPUT = 4.21.0
 
 # The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
 # generated HTML page (for example: .htm, .php, .asp).
diff --git a/docs/doxygen-user_fr/Doxyfile b/docs/doxygen-user_fr/Doxyfile
index 4538fd297cb471387af6a74e0cd574adc6f3bc02..06589836dfefdfa6c7e401c8e823f7bfdb3fb53c 100644
--- a/docs/doxygen-user_fr/Doxyfile
+++ b/docs/doxygen-user_fr/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Documentation utilisateur Autopsy"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER = 4.20.0
+PROJECT_NUMBER = 4.21.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
@@ -1025,7 +1025,7 @@ GENERATE_HTML          = YES
 # The default directory is: html.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_OUTPUT = 4.20.0
+HTML_OUTPUT = 4.21.0
 
 # The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
 # generated HTML page (for example: .htm, .php, .asp).
diff --git a/docs/doxygen/Doxyfile b/docs/doxygen/Doxyfile
index 4859eab17ff19375a0869b6e4020c3310b906d35..b0fdaea78cc45bc1abb4ebc454128c1f15390659 100644
--- a/docs/doxygen/Doxyfile
+++ b/docs/doxygen/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Autopsy"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER = 4.20.0
+PROJECT_NUMBER = 4.21.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears a the top of each page and should give viewer a
@@ -1066,7 +1066,7 @@ GENERATE_HTML          = YES
 # The default directory is: html.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_OUTPUT = api-docs/4.20.0/
+HTML_OUTPUT = api-docs/4.21.0/
 
 # The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
 # generated HTML page (for example: .htm, .php, .asp).