diff --git a/Cargo.lock b/Cargo.lock
index 3a13cc0..284cf50 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,40 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "aho-corasick"
+version = "0.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "memchr"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
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+checksum = "957056ecddbeba1b26965114e191d2e8589ce74db242b6ea25fc4062427a5c19"
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+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
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 [[package]]
 name = "sandwich"
 version = "0.1.0"
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diff --git a/Cargo.toml b/Cargo.toml
index d99656e..455aa67 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+regex = "1"