diff --git a/src/doc/book b/src/doc/book
index d94e03a18a259..21a2ed14f4480 160000
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit d94e03a18a2590ed3f1c67b859cb11528d2a2d5c
+Subproject commit 21a2ed14f4480dab62438dcc1130291bebc65379
diff --git a/src/doc/reference b/src/doc/reference
index e5adb99c04817..a9afb04b47a84 160000
--- a/src/doc/reference
+++ b/src/doc/reference
@@ -1 +1 @@
-Subproject commit e5adb99c04817b7fbe08f4ffce5b36702667345f
+Subproject commit a9afb04b47a84a6753e4dc657348c324c876102c
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
index efe23c4fe12e0..af0998b747383 160000
--- a/src/doc/rust-by-example
+++ b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit efe23c4fe12e06351b8dc8c3d18312c761455109
+Subproject commit af0998b7473839ca75563ba3d3e7fd0160bef235
diff --git a/src/doc/rustc-dev-guide b/src/doc/rustc-dev-guide
index 41a96ab971cb4..b06dab8408339 160000
--- a/src/doc/rustc-dev-guide
+++ b/src/doc/rustc-dev-guide
@@ -1 +1 @@
-Subproject commit 41a96ab971cb45e2a184df20619ad1829765c990
+Subproject commit b06dab84083390e0ee1e998f466545a8a1a76a9f