diff --git a/Cargo.lock b/Cargo.lock
index 7f712f1..4181c25 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,11 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "anyhow"
+version = "1.0.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c0df63cb2955042487fad3aefd2c6e3ae7389ac5dc1beb28921de0b69f779d4"
+
 [[package]]
 name = "aoc"
 version = "0.1.0"
@@ -33,6 +39,7 @@ dependencies = [
 name = "aoc2020"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "aoc",
  "criterion",
 ]
diff --git a/aoc2020/Cargo.toml b/aoc2020/Cargo.toml
index fe4fe68..c74bcf3 100644
--- a/aoc2020/Cargo.toml
+++ b/aoc2020/Cargo.toml
@@ -14,6 +14,8 @@ criterion = "0.3"
 
 aoc = { path = "../aoc" }
 
+anyhow = "1.0"
+
 [lib]
 path = "src/lib.rs"
 bench = false