diff --git a/src/index/io.rs b/src/index/io.rs
index 0c94887..8c6ab07 100644
--- a/src/index/io.rs
+++ b/src/index/io.rs
@@ -43,20 +43,16 @@ impl Index {
             self.version = max(self.version, index.version);
         }
         self.version = self.version.next();
-        self.write_index_to_file(self.index_file_path())?;
+        self.write_index_to_file(&self.index_file_path())?;
         lock.release()?;
         log::debug!("[{}] saved index version {} with lock id {}", getpid(), self.version, lock_id,);
         Ok(())
     }
 
-    fn write_index_to_file<T>(&mut self, path: T) -> Result<()>
-    where
-        T: AsRef<Path>,
-    {
+    fn write_index_to_file(&mut self, path: &Path) -> Result<()> {
         fs::create_dir_all(
-            path.as_ref()
-                .parent()
-                .ok_or_else(|| anyhow!("cannot compute parent path for {}", path.as_ref().to_string_lossy()))?,
+            path.parent()
+                .ok_or_else(|| anyhow!("cannot compute parent path for {}", path.to_string_lossy()))?,
         )
         .context("create index directory")?;
 
diff --git a/src/index/lock.rs b/src/index/lock.rs
index 8967747..ce6d727 100644
--- a/src/index/lock.rs
+++ b/src/index/lock.rs
@@ -14,7 +14,8 @@ pub struct Lock {
 }
 
 impl Lock {
-    pub fn lock(index_directory: &Path) -> Result<Self> {
+    pub fn lock<T: AsRef<Path>>(index_directory: T) -> Result<Self> {
+        let index_directory = index_directory.as_ref();
         let mut buffer = [0u8; 16];
         OsRng.fill_bytes(&mut buffer);
         let id = Uuid::from_bytes(buffer);
diff --git a/src/index/mod.rs b/src/index/mod.rs
index e63110d..a8eeb10 100644
--- a/src/index/mod.rs
+++ b/src/index/mod.rs
@@ -35,7 +35,9 @@ impl Index {
         }
     }
 
-    pub fn remember(&mut self, original_source_path: &Path, relative_path: &Path, id: ItemId) {
+    pub fn remember<S: AsRef<Path>, R: AsRef<Path>>(&mut self, original_source_path: S, relative_path: R, id: ItemId) {
+        let original_source_path = original_source_path.as_ref();
+        let relative_path = relative_path.as_ref();
         let item = if let Some(old) = self
             .newest_items_by_source_path
             .get(&original_source_path.to_string_lossy().to_string())
@@ -71,7 +73,8 @@ impl Index {
         )
     }
 
-    pub fn newest_item_by_source_path(&self, path: &Path) -> Result<Option<IndexItem>> {
+    pub fn newest_item_by_source_path<T: AsRef<Path>>(&self, path: T) -> Result<Option<IndexItem>> {
+        let path = path.as_ref();
         if !path.is_absolute() {
             return Err(anyhow!("repository path not absolute"));
         }
diff --git a/src/repository/mod.rs b/src/repository/mod.rs
index bb3f64f..cd99d8f 100644
--- a/src/repository/mod.rs
+++ b/src/repository/mod.rs
@@ -82,19 +82,13 @@ impl fmt::Display for ItemId {
 }
 
 impl<'a> Repository {
-    pub fn init<T>(path: T) -> Result<()>
-    where
-        T: AsRef<Path>,
-    {
+    pub fn init<T: AsRef<Path>>(path: T) -> Result<()> {
         let mut index = Index::new(path.as_ref());
         index.save()?;
         Ok(())
     }
 
-    pub fn open<T>(path: T) -> Result<Repository>
-    where
-        T: AsRef<Path>,
-    {
+    pub fn open<T: AsRef<Path>>(path: T) -> Result<Repository> {
         let path = path.as_ref();
         if !path.is_absolute() {
             return Err(anyhow!("path to repository not absolute"));