diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a0d75eb..7b7dc54 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable
-      - run: (test -x $HOME/.cargo/bin/mdbook || cargo install --vers "^0.4" mdbook)
+      - run: (test -x $HOME/.cargo/bin/mdbook || cargo install --vers "^0.5" mdbook)
       - run: mdbook build && mdbook test
       - uses: peaceiris/actions-gh-pages@v3
         with:
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 8114a71..7b8f39b 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -13,5 +13,5 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable
-      - run: (test -x $HOME/.cargo/bin/mdbook || cargo install --vers "^0.4" mdbook)
+      - run: (test -x $HOME/.cargo/bin/mdbook || cargo install --vers "^0.5" mdbook)
       - run: mdbook build && mdbook test
diff --git a/book.toml b/book.toml
index 62aebd2..03d42a5 100644
--- a/book.toml
+++ b/book.toml
@@ -1,6 +1,5 @@
 [book]
 authors = ["David Koloski"]
 language = "en"
-multilingual = false
 src = "src"
 title = "Learn unsafe Rust"