diff --git a/Cargo.toml b/Cargo.toml
index 121c50d..505b6c5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,10 +12,10 @@ crate-type = ["cdylib", "rlib"]
 lto = true
 
 [dependencies]
-pest = "2.7"
-pest_fmt = "0.2"
-pest_meta = { version = "2.7", features = ["grammar-extras"] }
-pest_vm = { version = "2.7", features = ["grammar-extras"] }
+pest = "2.7.8"
+pest_fmt = "0.2.5"
+pest_meta = { version = "2.7.8", features = ["grammar-extras"] }
+pest_vm = { version = "2.7.8", features = ["grammar-extras"] }
 serde-wasm-bindgen = "0.5"
 wasm-bindgen = "0.2"
 
diff --git a/book b/book
index f4ad611..b246fd5 160000
--- a/book
+++ b/book
@@ -1 +1 @@
-Subproject commit f4ad6111662689311423cd2cd667ca7b48f6f524
+Subproject commit b246fd5e804e131b86cfcb09a18681e6730db2da