diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01c462198c..bd9606c987 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,16 @@ All notable changes to `src-cli` are documented in this file.
 
 ### Fixed
 
+## 3.21.4
+
+### Added
+
+### Changed
+
+### Fixed
+
+- The `src lsif upload` command now respects `SRC_HEADER_` environment variables for multipart uploads. These environment variables are described [here](AUTH_PROXY.md). [#360](https://github.com/sourcegraph/src-cli/pull/360)
+
 ## 3.21.3
 
 ### Added
@@ -24,7 +34,7 @@ All notable changes to `src-cli` are documented in this file.
 ### Changed
 
 - The progress bar in `src campaign [preview|apply]` now shows when executing a step failed in a repository by styling the line red and displaying standard error output. [#355](https://github.com/sourcegraph/src-cli/pull/355)
-- The `src lsif upload` command will give more informative output when an unexpected payload (non-JSON or non-unmarshallable) is received from the target endpoint.
+- The `src lsif upload` command will give more informative output when an unexpected payload (non-JSON or non-unmarshallable) is received from the target endpoint. [#359](https://github.com/sourcegraph/src-cli/pull/359)
 
 ### Fixed
 
diff --git a/cmd/src/headers_test.go b/cmd/src/headers_test.go
index 2b4582211d..cca976a918 100644
--- a/cmd/src/headers_test.go
+++ b/cmd/src/headers_test.go
@@ -17,6 +17,7 @@ func TestParseAdditionalHeaders(t *testing.T) {
 		{environ: []string{"SRC_HEADER_AUTHORIZATION=foo,bar,baz"}, headers: map[string]string{"authorization": "foo,bar,baz"}},
 		{environ: []string{"SRC_HEADER_A=foo", "SRC_HEADER_B=bar", "SRC_HEADER_C=baz"}, headers: map[string]string{"a": "foo", "b": "bar", "c": "baz"}},
 		{environ: []string{"SRC_HEADER_A", "SRC_HEADER_B=", "SRC_HEADER_=baz"}, headers: map[string]string{}},
+		{environ: []string{"SRC_HEADER_X-Dbx-Auth-Token=foo"}, headers: map[string]string{"x-dbx-auth-token": "foo"}},
 	}
 
 	for _, testCase := range testCases {
diff --git a/go.mod b/go.mod
index 90da6c0928..ad07a71a35 100644
--- a/go.mod
+++ b/go.mod
@@ -20,7 +20,7 @@ require (
 	github.com/pkg/browser v0.0.0-20180916011732-0a3d74bf9ce4
 	github.com/pkg/errors v0.9.1
 	github.com/sourcegraph/campaignutils v0.0.0-20201016010611-63eb2bca27ad
-	github.com/sourcegraph/codeintelutils v0.0.0-20201021190916-9622286ad906
+	github.com/sourcegraph/codeintelutils v0.0.0-20201021234242-00a82702de0d
 	github.com/sourcegraph/go-diff v0.6.0
 	github.com/sourcegraph/jsonx v0.0.0-20200629203448-1a936bd500cf
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
diff --git a/go.sum b/go.sum
index 9158a2916a..588ad342c7 100644
--- a/go.sum
+++ b/go.sum
@@ -54,6 +54,8 @@ github.com/sourcegraph/campaignutils v0.0.0-20201016010611-63eb2bca27ad h1:HeSWF
 github.com/sourcegraph/campaignutils v0.0.0-20201016010611-63eb2bca27ad/go.mod h1:xm6i78Mk2t4DBLQDqEFc/3x6IPf7yYZCgbNaTQGhJHA=
 github.com/sourcegraph/codeintelutils v0.0.0-20201021190916-9622286ad906 h1:QrFRo45noesSAPUWDaE2KWJvtzM4KKLYzkbK7QkpLUA=
 github.com/sourcegraph/codeintelutils v0.0.0-20201021190916-9622286ad906/go.mod h1:HplI8gRslTrTUUsSYwu28hSOderix7m5dHNca7xBzeo=
+github.com/sourcegraph/codeintelutils v0.0.0-20201021234242-00a82702de0d h1:C+cLrOgPEluecyFz28u9AqP+/4Zp2YxpOI7EAnhK5Zo=
+github.com/sourcegraph/codeintelutils v0.0.0-20201021234242-00a82702de0d/go.mod h1:HplI8gRslTrTUUsSYwu28hSOderix7m5dHNca7xBzeo=
 github.com/sourcegraph/go-diff v0.6.0 h1:WbN9e/jD8ujU+o0vd9IFN5AEwtfB0rn/zM/AANaClqQ=
 github.com/sourcegraph/go-diff v0.6.0/go.mod h1:iBszgVvyxdc8SFZ7gm69go2KDdt3ag071iBaWPF6cjs=
 github.com/sourcegraph/jsonx v0.0.0-20200629203448-1a936bd500cf h1:oAdWFqhStsWiiMP/vkkHiMXqFXzl1XfUNOdxKJbd6bI=