diff --git a/Cargo.lock b/Cargo.lock
index 443a94d2..34749611 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -517,14 +517,14 @@ dependencies = [
  "pretty_assertions 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "pulldown-cmark 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "pulldown-cmark-to-cmark 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "select 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "shlex 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "staticfile 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "tempfile 3.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tempfile 3.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml-query 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -856,6 +856,18 @@ dependencies = [
  "utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "regex"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "regex-syntax"
 version = "0.5.5"
@@ -864,6 +876,14 @@ dependencies = [
  "ucd-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "regex-syntax"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ucd-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "remove_dir_all"
 version = "0.5.1"
@@ -1079,7 +1099,7 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "3.0.1"
+version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1462,7 +1482,9 @@ dependencies = [
 "checksum redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)" = "0d92eecebad22b767915e4d529f89f28ee96dbbf5a4810d2b844373f136417fd"
 "checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
 "checksum regex 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)" = "aec3f58d903a7d2a9dc2bf0e41a746f4530e0cab6b615494e058f67a3ef947fb"
+"checksum regex 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "75ecf88252dce580404a22444fc7d626c01815debba56a7f4f536772a5ff19d3"
 "checksum regex-syntax 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "bd90079345f4a4c3409214734ae220fd773c6f2e8a543d07370c6c1c369cfbfb"
+"checksum regex-syntax 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8f1ac0f60d675cc6cf13a20ec076568254472551051ad5dd050364d70671bf6b"
 "checksum remove_dir_all 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3488ba1b9a2084d38645c4c08276a1752dcbf2c7130d74f1569681ad5d2799c5"
 "checksum rustc-demangle 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "11fb43a206a04116ffd7cfcf9bcb941f8eb6cc7ff667272246b0a1c74259a3cb"
 "checksum rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)" = "dcf128d1287d2ea9d80910b5f1120d0b8eede3fbf1abe91c40d39ea7d51e6fda"
@@ -1491,7 +1513,7 @@ dependencies = [
 "checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
 "checksum syn 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)" = "91b52877572087400e83d24b9178488541e3d535259e04ff17a63df1e5ceff59"
 "checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
-"checksum tempfile 3.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8cddbd26c5686ece823b507f304c8f188daef548b4cb753512d929ce478a093c"
+"checksum tempfile 3.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "47776f63b85777d984a50ce49d6b9e58826b6a3766a449fc95bc66cd5663c15b"
 "checksum tendril 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1b72f8e2f5b73b65c315b1a70c730f24b9d7a25f39e98de8acbe2bb795caea"
 "checksum tendril 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9de21546595a0873061940d994bbbc5c35f024ae4fd61ec5c5b159115684f508"
 "checksum termcolor 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "adc4587ead41bf016f11af03e55a624c06568b5a19db4e90fde573d805074f83"
diff --git a/Cargo.toml b/Cargo.toml
index 8883d9a3..d7fc6567 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,7 +34,7 @@ env_logger = "0.5.0-rc.1"
 toml = "0.4"
 memchr = "2.0"
 open = "1.1"
-regex = "0.2.1"
+regex = "1.0.0"
 tempfile = "3.0"
 itertools = "0.7"
 shlex = "0.1"
diff --git a/README.md b/README.md
index d2b79a4e..a945f7f2 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ There are multiple ways to install mdBook.
 
 2. **From Crates.io**
 
-   This requires [Rust] and Cargo to be installed. Once you have installed
+   This requires at least [Rust] 1.20 and Cargo to be installed. Once you have installed
    Rust, type the following in the terminal:
 
    ```