diff --git a/Cargo.lock b/Cargo.lock
index 6c985c0..849973e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -29,15 +29,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "ansi_term"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
-dependencies = [
- "winapi 0.3.9",
-]
-
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -1255,14 +1246,14 @@ checksum = "3831453b3449ceb48b6d9c7ad7c96d5ea673e9b470a1dc578c2ce6521230884c"
 
 [[package]]
 name = "pretty_assertions"
-version = "1.2.1"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c89f989ac94207d048d92db058e4f6ec7342b0971fc58d1271ca148b799b3563"
+checksum = "a25e9bcb20aa780fd0bb16b72403a9064d6b3f22f026946029acb941a50af755"
 dependencies = [
- "ansi_term",
  "ctor",
  "diff",
  "output_vt100",
+ "yansi",
 ]
 
 [[package]]
@@ -2090,6 +2081,12 @@ dependencies = [
  "linked-hash-map",
 ]
 
+[[package]]
+name = "yansi"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09041cd90cf85f7f8b2df60c646f853b7f535ce68f85244eb6731cf89fa498ec"
+
 [[package]]
 name = "zip"
 version = "0.6.2"
diff --git a/Cargo.toml b/Cargo.toml
index 7796959..dceb7a5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ serde_yaml = "0.8"
 chrono = "0.4"
 dicom-object = "0.4"
 maplit = "1.0"
-pretty_assertions = "1.2"
+pretty_assertions = "1.3"
 regex = "1.4"
 tempfile = "3.3"
 zip = "0.6"