diff --git a/CHANGELOG.md b/CHANGELOG.md
index f568e8e95..ac9416dae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Change Log
 
+- docs api: added conversion from vsdm, vsdx, vssm, vssx, vstm, vstx formats
+- docs api: added the diagram document type to the documentType parameter
 - docs api: added the Lifecycle of opening editor page
 - docs api: added the editorConfig.customization.mobile.info parameter
 - docs api: added opening for pages, key, numbers formats
diff --git a/site/pages/Docs/Docs API/Additional API/Conversion API/Conversion tables/index.md b/site/pages/Docs/Docs API/Additional API/Conversion API/Conversion tables/index.md
index e6ac0b4b4..15b1d76ff 100644
--- a/site/pages/Docs/Docs API/Additional API/Conversion API/Conversion tables/index.md	
+++ b/site/pages/Docs/Docs API/Additional API/Conversion API/Conversion tables/index.md	
@@ -78,3 +78,14 @@ Below you can find tables with formats that are available for conversion in diff
 | pptm | +   | +   | +   | +   | +   | +   | +    | +   | +    | +    | +    | +    |      | +    |
 | pptx | +   | +   | +   | +   | +   | +   | +    | +   | +    | +    | +    | +    | +    |      |
 | sxi  | +   | +   | +   | +   | +   | +   | +    | +   | +    | +    | +    | +    | +    | +    |
+
+## Diagram document file formats
+
+|      | bmp | gif | jpg | pdf | pdfa | png |
+| ---- | --- | --- | --- | --- | ---- | --- |
+| vsdm | +   | +   | +   | +   | +    | +   |
+| vsdx | +   | +   | +   | +   | +    | +   |
+| vssm | +   | +   | +   | +   | +    | +   |
+| vssx | +   | +   | +   | +   | +    | +   |
+| vstm | +   | +   | +   | +   | +    | +   |
+| vstx | +   | +   | +   | +   | +    | +   |
diff --git a/site/pages/Docs/Docs API/More Information/Changelog/index.md b/site/pages/Docs/Docs API/More Information/Changelog/index.md
index 357cad960..b2d6147d0 100644
--- a/site/pages/Docs/Docs API/More Information/Changelog/index.md	
+++ b/site/pages/Docs/Docs API/More Information/Changelog/index.md	
@@ -2,6 +2,8 @@ The list of changes of ONLYOFFICE Docs API.
 
 ## Version 8.3
 
+- Added conversion from [vsdm, vsdx, vssm, vssx, vstm, vstx](../../Additional%20API/Conversion%20API/Conversion%20tables/index.md#diagram-document-file-formats) formats.
+- Added the *diagram* document type to the [documentType](../../Usage%20API/Config/index.md#documenttype) parameter.
 - Added the [editorConfig.customization.mobile.info](../../Usage%20API/Config/Editor/Customization/index.md#mobileinfo) parameter.
 - Added opening for [pages, key, numbers](../../Usage%20API/Config/index.md#documenttype) formats.
 - Added the [events.onUserActionRequired](../../Usage%20API/Config/Events/index.md#onuseractionrequired) event.
diff --git a/site/pages/Docs/Docs API/Usage API/Config/Document/index.md b/site/pages/Docs/Docs API/Usage API/Config/Document/index.md
index 07c00493a..5669908ad 100644
--- a/site/pages/Docs/Docs API/Usage API/Config/Document/index.md	
+++ b/site/pages/Docs/Docs API/Usage API/Config/Document/index.md	
@@ -2,7 +2,7 @@ The document section allows to change all the parameters pertaining to the docum
 
 ## fileType
 
-Defines the type of the file for the source viewed or edited document. Must be lowercase. The following file types are available: *.csv, .djvu, .doc, .docm, .docx, .docxf, .dot, .dotm, .dotx, .epub, .fb2, .fodp, .fods, .fodt, .htm, .html, .key, .mht, .numbers, .odp, .ods, .odt, .oform, .otp, .ots, .ott, .oxps, .pages, .pdf, .pot, .potm, .potx, .pps, .ppsm, .ppsx, .ppt, .pptm, .pptx, .rtf, .txt, .xls, .xlsb, .xlsm, .xlsx, .xlt, .xltm, .xltx, .xml, .xps*.
+Defines the type of the file for the source viewed or edited document. Must be lowercase. The following file types are available: *.csv, .djvu, .doc, .docm, .docx, .docxf, .dot, .dotm, .dotx, .epub, .fb2, .fodp, .fods, .fodt, .htm, .html, .key, .mht, .numbers, .odp, .ods, .odt, .oform, .otp, .ots, .ott, .oxps, .pages, .pdf, .pot, .potm, .potx, .pps, .ppsm, .ppsx, .ppt, .pptm, .pptx, .rtf, .txt, .vsdm, .vsdx, .vssm, .vssx, .vstm, .vstx, .xls, .xlsb, .xlsm, .xlsx, .xlt, .xltm, .xltx, .xml, .xps*.
 
 > This parameter is required.
 
diff --git a/site/pages/Docs/Docs API/Usage API/Config/index.md b/site/pages/Docs/Docs API/Usage API/Config/index.md
index dbc0b940d..f76fb69da 100644
--- a/site/pages/Docs/Docs API/Usage API/Config/index.md	
+++ b/site/pages/Docs/Docs API/Usage API/Config/index.md	
@@ -11,7 +11,8 @@ Defines the document type to be opened:
 - **word** - text document (*.doc, .docm, .docx, .dot, .dotm, .dotx, .epub, .fb2, .fodt, .htm, .html, .mht, .mhtml, .odt, .ott, .pages, .rtf, .stw, .sxw, .txt, .wps, .wpt, .xml*);
 - **cell** - spreadsheet (*.csv, .et, .ett, .fods, .numbers, .ods, .ots, .sxc, .xls, .xlsb, .xlsm, .xlsx, .xlt, .xltm, .xltx, .xml*);
 - **slide** - presentation (*.dps, .dpt, .fodp, .key, .odp, .otp, .pot, .potm, .potx, .pps, .ppsm, .ppsx, .ppt, .pptm, .pptx, .sxi*);
-- **pdf** - portable document format (*.djvu, .docxf, .oform, .oxps, .pdf, .xps*).
+- **pdf** - portable document format (*.djvu, .docxf, .oform, .oxps, .pdf, .xps*);
+- **diagram** - diagram document (*.vsdm, .vsdx, .vssm, .vssx, .vstm, .vstx*).
 
 Type: string