diff --git a/src/doc/book b/src/doc/book
index d33916341d480..230c68bc1e08f 160000
--- a/src/doc/book
+++ b/src/doc/book
@@ -1 +1 @@
-Subproject commit d33916341d480caede1d0ae57cbeae23aab23e88
+Subproject commit 230c68bc1e08f5f3228384a28cc228c81dfbd10d
diff --git a/src/doc/reference b/src/doc/reference
index 387392674d746..acd0231ebc748 160000
--- a/src/doc/reference
+++ b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 387392674d74656f7cb437c05a96f0c52ea8e601
+Subproject commit acd0231ebc74849f6a8907b5e646ce86721aad76
diff --git a/src/doc/rust-by-example b/src/doc/rust-by-example
index 8a8918c698534..c9d151f9147c4 160000
--- a/src/doc/rust-by-example
+++ b/src/doc/rust-by-example
@@ -1 +1 @@
-Subproject commit 8a8918c698534547fa8a1a693cb3e7277f0bfb2f
+Subproject commit c9d151f9147c4808c77f0375ba3fa5d54443cb9e