diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3fa2071..8123e15 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ project adheres to
 ## Unreleased
 
 * Current stable rust is 1.57, MSRV is now 1.46.0.
+* Update nom dependency to 7.1.0.
 * Update optional rsass to 0.23.0.
 * Update env_logger to 0.9 and gotham to 0.7.1 in examples
 
diff --git a/Cargo.toml b/Cargo.toml
index e109f4f..d7578ec 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ base64 = "^0.13"
 bytecount = "0.6.0"
 itertools = "0.10.0"
 md5 = "0.7"
-nom = "6.1.0"
+nom = "7.1.0"
 
 rsass = { version = "0.23.0", optional = true }
 mime = { version = "0.3", optional = true }
diff --git a/src/expression.rs b/src/expression.rs
index 1dadaee..0e4f386 100644
--- a/src/expression.rs
+++ b/src/expression.rs
@@ -31,7 +31,7 @@ pub fn expression(input: &[u8]) -> PResult<&str> {
                         preceded(tag("!"), expr_in_parens),
                         preceded(tag("!"), expr_in_brackets),
                     )),
-                    (),
+                    || (),
                     |_, _| (),
                 ),
             )),