diff --git a/espr/Cargo.toml b/espr/Cargo.toml
index 719362145..631a06f23 100644
--- a/espr/Cargo.toml
+++ b/espr/Cargo.toml
@@ -15,7 +15,7 @@ categories    = ["science", "development-tools"]
 
 [dependencies]
 # For parser
-nom = "7.1.3"
+nom = "8.0.0"
 
 # For Rust code generation
 syn = "2.0.9"
diff --git a/ruststep/Cargo.toml b/ruststep/Cargo.toml
index fed5e0e6f..3b0645fa7 100644
--- a/ruststep/Cargo.toml
+++ b/ruststep/Cargo.toml
@@ -21,7 +21,7 @@ ap203 = []
 [dependencies]
 derive_more = "0.99.17"
 derive-new = "0.5.9"
-nom = "7.1.3"
+nom = "8.0.0"
 serde = { version = "1.0.158", features = ["derive"] }
 thiserror = "1.0.40"
 Inflector = "0.11.4"