diff --git a/Cargo.lock b/Cargo.lock
index 51427f57822df..79d93bbfb528e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5228,9 +5228,9 @@ dependencies = [
 
 [[package]]
 name = "stringdex"
-version = "0.0.1-alpha4"
+version = "0.0.1-alpha6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2841fd43df5b1ff1b042e167068a1fe9b163dc93041eae56ab2296859013a9a0"
+checksum = "202353c896804b8818f38f099422384afa2c592bd4532253d245bad16e2bb5b0"
 dependencies = [
  "stacker",
 ]
diff --git a/src/librustdoc/Cargo.toml b/src/librustdoc/Cargo.toml
index 5d36ffc2d3a52..5fd535fa807ec 100644
--- a/src/librustdoc/Cargo.toml
+++ b/src/librustdoc/Cargo.toml
@@ -21,7 +21,7 @@ rustdoc-json-types = { path = "../rustdoc-json-types" }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 smallvec = "1.8.1"
-stringdex = { version = "0.0.1-alpha4" }
+stringdex = { version = "0.0.1-alpha6" }
 tempfile = "3"
 threadpool = "1.8.1"
 tracing = "0.1"