diff --git a/b2/b2.go b/b2/b2.go
index 739b807ed..7a880770e 100644
--- a/b2/b2.go
+++ b/b2/b2.go
@@ -46,7 +46,7 @@ const (
 
 // Globals
 var (
-	minChunkSize       = fs.SizeSuffix(100E6)
+	minChunkSize       = fs.SizeSuffix(5E6)
 	chunkSize          = fs.SizeSuffix(96 * 1024 * 1024)
 	uploadCutoff       = fs.SizeSuffix(200E6)
 	b2TestMode         = fs.StringP("b2-test-mode", "", "", "A flag string for X-Bz-Test-Mode header.")
diff --git a/docs/content/b2.md b/docs/content/b2.md
index 146a7456d..ea1383b29 100644
--- a/docs/content/b2.md
+++ b/docs/content/b2.md
@@ -248,7 +248,7 @@ system.
 
 When uploading large files chunk the file into this size.  Note that
 these chunks are buffered in memory and there might a maximum of
-`--transfers` chunks in progress at once.  100,000,000 Bytes is the
+`--transfers` chunks in progress at once.  5,000,000 Bytes is the
 minimim size (default 96M).
 
 #### --b2-upload-cutoff=SIZE ####