diff --git a/src/api/items.rs b/src/api/items.rs
index 411df08..9c62989 100644
--- a/src/api/items.rs
+++ b/src/api/items.rs
@@ -33,10 +33,6 @@ impl Items {
 
     /// Returns the items indexed by ID
     pub fn items(&self) -> DataResult<HashMap<u32, Item>> {
-        Ok(self
-            .items_array()?
-            .into_iter()
-            .map(|i| (i.id.clone(), i))
-            .collect())
+        Ok(self.items_array()?.into_iter().map(|i| (i.id, i)).collect())
     }
 }
diff --git a/src/api/versions.rs b/src/api/versions.rs
index 516ce10..4a1fe57 100644
--- a/src/api/versions.rs
+++ b/src/api/versions.rs
@@ -29,7 +29,7 @@ pub fn latest_stable() -> DataResult<Version> {
         .into_iter()
         .filter_map(|v| {
             let version_string = v.clone();
-            let mut parts = version_string.split(".");
+            let mut parts = version_string.split('.');
 
             Some((
                 v,
diff --git a/src/data/mod.rs b/src/data/mod.rs
index fa6730c..c5dfa08 100644
--- a/src/data/mod.rs
+++ b/src/data/mod.rs
@@ -41,9 +41,9 @@ pub static VERSIONS_FILE: &str = "versions";
 pub fn get_common_file(filename: &str) -> DataResult<String> {
     MINECRAFT_DATA
         .get_file(format!("pc/common/{}.json", filename))
-        .ok_or(DataError::NotFoundError(filename.to_string()))?
+        .ok_or_else(|| DataError::NotFoundError(filename.to_string()))?
         .contents_utf8()
-        .ok_or(DataError::InvalidEncodingError(filename.to_string()))
+        .ok_or_else(|| DataError::InvalidEncodingError(filename.to_string()))
         .map(|d| d.to_string())
 }
 
@@ -52,12 +52,11 @@ pub fn get_version_specific_file(version: &Version, filename: &str) -> DataResul
     let path = get_path(version, filename)?;
     MINECRAFT_DATA
         .get_file(format!("{}/{}.json", path, filename))
-        .ok_or(DataError::NotFoundError(format!(
-            "{}/{}",
-            version.minecraft_version, filename
-        )))?
+        .ok_or_else(|| {
+            DataError::NotFoundError(format!("{}/{}", version.minecraft_version, filename))
+        })?
         .contents_utf8()
-        .ok_or(DataError::InvalidEncodingError(filename.to_string()))
+        .ok_or_else(|| DataError::InvalidEncodingError(filename.to_string()))
         .map(|d| d.to_string())
 }
 
@@ -69,20 +68,18 @@ pub fn get_path(version: &Version, filename: &str) -> DataResult<String> {
     PATHS
         .pc
         .get(&version.minecraft_version)
-        .ok_or(DataError::NotFoundError(version.minecraft_version.clone()))?
+        .ok_or_else(|| DataError::NotFoundError(version.minecraft_version.clone()))?
         .get(filename)
         .cloned()
-        .ok_or(DataError::NotFoundError(filename.to_string()))
+        .ok_or_else(|| DataError::NotFoundError(filename.to_string()))
 }
 
 /// Returns the parsed data paths
 fn get_datapaths() -> DataResult<Datapaths> {
     let content = MINECRAFT_DATA
         .get_file("dataPaths.json")
-        .ok_or(DataError::NotFoundError("dataPaths.json".to_string()))?
+        .ok_or_else(|| DataError::NotFoundError("dataPaths.json".to_string()))?
         .contents_utf8()
-        .ok_or(DataError::InvalidEncodingError(
-            "dataPaths.json".to_string(),
-        ))?;
+        .ok_or_else(|| DataError::InvalidEncodingError("dataPaths.json".to_string()))?;
     serde_json::from_str::<Datapaths>(content).map_err(DataError::from)
 }