diff --git a/src/expand.rs b/src/expand.rs
index 8b22425..357561e 100644
--- a/src/expand.rs
+++ b/src/expand.rs
@@ -279,6 +279,7 @@ fn make_manifest(
         },
         features,
         dependencies: std::collections::BTreeMap::new(),
+        dev_dependencies: std::collections::BTreeMap::new(),
         bins: Vec::new(),
         workspace: Some(Workspace {
             package: crate::manifest::WorkspacePackage {
@@ -294,7 +295,7 @@ fn make_manifest(
 
     manifest.dependencies.extend(source_manifest.dependencies);
     manifest
-        .dependencies
+        .dev_dependencies
         .extend(source_manifest.dev_dependencies);
     manifest.dependencies.insert(
         crate_name,
diff --git a/src/manifest.rs b/src/manifest.rs
index c08ffef..c10d1e1 100644
--- a/src/manifest.rs
+++ b/src/manifest.rs
@@ -14,6 +14,8 @@ pub struct Manifest {
     #[serde(skip_serializing_if = "Map::is_empty")]
     pub features: Map<String, Vec<String>>,
     pub dependencies: Map<String, Dependency>,
+    #[serde(rename = "dev-dependencies")]
+    pub dev_dependencies: Map<String, Dependency>,
     #[serde(rename = "bin")]
     pub bins: Vec<Bin>,
     #[serde(skip_serializing_if = "Option::is_none")]