diff --git a/docs/content.fsx b/docs/content.fsx
index 37e5ff6f0..7730c77ed 100644
--- a/docs/content.fsx
+++ b/docs/content.fsx
@@ -66,7 +66,7 @@ copy of this content in your `content` directory.
 
 ## Ignored Content
 
-Any file or directory beginning with `.` is ignored.
+Any file or directory beginning with `.` is ignored. Also `node_modules` directory is ignored.
 
 ## Front matter
 
diff --git a/src/fsdocs-tool/BuildCommand.fs b/src/fsdocs-tool/BuildCommand.fs
index 2cd1b096b..745765c16 100644
--- a/src/fsdocs-tool/BuildCommand.fs
+++ b/src/fsdocs-tool/BuildCommand.fs
@@ -94,6 +94,9 @@ type internal DocContent
         |> Array.filter (fun x -> x.Length = 2)
         |> Array.distinct
 
+    let sourceFileOrFolderIsSkipped (input: string) =
+        input.StartsWith "." || input = "node_modules"
+
     let makeMarkdownLinkResolver
         (inputFolderAsGiven, outputFolderRelativeToRoot, fullPathFileMap: Map<(string * OutputKind), string>, outputKind)
         (markdownReference: string)
@@ -155,7 +158,7 @@ type internal DocContent
 
           for subInputFolderFullPath in Directory.EnumerateDirectories(inputFolderAsGiven) do
               let subInputFolderName = Path.GetFileName(subInputFolderFullPath)
-              let subFolderIsSkipped = subInputFolderName.StartsWith "."
+              let subFolderIsSkipped = sourceFileOrFolderIsSkipped subInputFolderName
               let subFolderIsOutput = subFolderIsOutput subInputFolderFullPath
 
               if not subFolderIsOutput && not subFolderIsSkipped then
@@ -485,7 +488,7 @@ type internal DocContent
 
           for subInputFolderFullPath in Directory.EnumerateDirectories(inputFolderAsGiven) do
               let subInputFolderName = Path.GetFileName(subInputFolderFullPath)
-              let subFolderIsSkipped = subInputFolderName.StartsWith "."
+              let subFolderIsSkipped = sourceFileOrFolderIsSkipped subInputFolderName
               let subFolderIsOutput = subFolderIsOutput subInputFolderFullPath
 
               if subFolderIsOutput || subFolderIsSkipped then