diff --git a/crates/collab/src/tests/randomized_integration_tests.rs b/crates/collab/src/tests/randomized_integration_tests.rs
index ed8f984d274228b7c777635c73e6ac2686407991..e0170f6648e3d03eb5fd1d81cad444ce498534dc 100644
--- a/crates/collab/src/tests/randomized_integration_tests.rs
+++ b/crates/collab/src/tests/randomized_integration_tests.rs
@@ -410,10 +410,10 @@ async fn test_random_collaboration(
                     guest_buffer.read_with(client_cx, |b, _| b.saved_version().clone());
                 assert_eq!(guest_saved_version, host_saved_version);
 
-                let host_saved_version_fingerprint = host_buffer
-                    .read_with(host_cx, |b, _| b.saved_version_fingerprint().to_string());
-                let guest_saved_version_fingerprint = guest_buffer
-                    .read_with(client_cx, |b, _| b.saved_version_fingerprint().to_string());
+                let host_saved_version_fingerprint =
+                    host_buffer.read_with(host_cx, |b, _| b.saved_version_fingerprint());
+                let guest_saved_version_fingerprint =
+                    guest_buffer.read_with(client_cx, |b, _| b.saved_version_fingerprint());
                 assert_eq!(
                     guest_saved_version_fingerprint,
                     host_saved_version_fingerprint
diff --git a/crates/editor/src/items.rs b/crates/editor/src/items.rs
index f8fa3c9df0e68b0c813616e6480a9a98382866c9..cce6d338f0278ff0d32e5db89a6ad73bd2dff6db 100644
--- a/crates/editor/src/items.rs
+++ b/crates/editor/src/items.rs
@@ -13,8 +13,10 @@ use gpui::{
     elements::*, geometry::vector::vec2f, AppContext, Entity, ModelHandle, MutableAppContext,
     RenderContext, Subscription, Task, View, ViewContext, ViewHandle, WeakViewHandle,
 };
-use language::proto::serialize_anchor as serialize_text_anchor;
-use language::{Bias, Buffer, File as _, OffsetRangeExt, Point, SelectionGoal};
+use language::{
+    proto::serialize_anchor as serialize_text_anchor, Bias, Buffer, File as _, OffsetRangeExt,
+    Point, SelectionGoal,
+};
 use project::{File, FormatTrigger, Project, ProjectEntryId, ProjectPath};
 use rpc::proto::{self, update_view};
 use settings::Settings;
@@ -1165,9 +1167,11 @@ fn path_for_file<'a>(
 mod tests {
     use super::*;
     use gpui::MutableAppContext;
+    use language::RopeFingerprint;
     use std::{
         path::{Path, PathBuf},
         sync::Arc,
+        time::SystemTime,
     };
 
     #[gpui::test]
@@ -1197,7 +1201,7 @@ mod tests {
             todo!()
         }
 
-        fn mtime(&self) -> std::time::SystemTime {
+        fn mtime(&self) -> SystemTime {
             todo!()
         }
 
@@ -1216,7 +1220,7 @@ mod tests {
             _: clock::Global,
             _: project::LineEnding,
             _: &mut MutableAppContext,
-        ) -> gpui::Task<anyhow::Result<(clock::Global, String, std::time::SystemTime)>> {
+        ) -> gpui::Task<anyhow::Result<(clock::Global, RopeFingerprint, SystemTime)>> {
             todo!()
         }
 
diff --git a/crates/project/src/worktree.rs b/crates/project/src/worktree.rs
index f22e91578565492f1b1a14ac8981f3f393f5eb8c..b65cf9e39bd96367a3e0b0d45989fcbdce76cf9b 100644
--- a/crates/project/src/worktree.rs
+++ b/crates/project/src/worktree.rs
@@ -20,10 +20,12 @@ use gpui::{
     executor, AppContext, AsyncAppContext, Entity, ModelContext, ModelHandle, MutableAppContext,
     Task,
 };
-use language::Unclipped;
 use language::{
-    proto::{deserialize_version, serialize_line_ending, serialize_version},
-    Buffer, DiagnosticEntry, PointUtf16, Rope,
+    proto::{
+        deserialize_fingerprint, deserialize_version, serialize_fingerprint, serialize_line_ending,
+        serialize_version,
+    },
+    Buffer, DiagnosticEntry, PointUtf16, Rope, RopeFingerprint, Unclipped,
 };
 use parking_lot::Mutex;
 use postage::{
@@ -1863,7 +1865,7 @@ impl language::File for File {
         version: clock::Global,
         line_ending: LineEnding,
         cx: &mut MutableAppContext,
-    ) -> Task<Result<(clock::Global, String, SystemTime)>> {
+    ) -> Task<Result<(clock::Global, RopeFingerprint, SystemTime)>> {
         self.worktree.update(cx, |worktree, cx| match worktree {
             Worktree::Local(worktree) => {
                 let rpc = worktree.client.clone();
@@ -1878,7 +1880,7 @@ impl language::File for File {
                             buffer_id,
                             version: serialize_version(&version),
                             mtime: Some(entry.mtime.into()),
-                            fingerprint: fingerprint.clone(),
+                            fingerprint: serialize_fingerprint(fingerprint),
                         })?;
                     }
                     Ok((version, fingerprint, entry.mtime))
@@ -1896,11 +1898,12 @@ impl language::File for File {
                         })
                         .await?;
                     let version = deserialize_version(response.version);
+                    let fingerprint = deserialize_fingerprint(&response.fingerprint)?;
                     let mtime = response
                         .mtime
                         .ok_or_else(|| anyhow!("missing mtime"))?
                         .into();
-                    Ok((version, response.fingerprint, mtime))
+                    Ok((version, fingerprint, mtime))
                 })
             }
         })
@@ -1943,7 +1946,7 @@ impl language::LocalFile for File {
         &self,
         buffer_id: u64,
         version: &clock::Global,
-        fingerprint: String,
+        fingerprint: RopeFingerprint,
         line_ending: LineEnding,
         mtime: SystemTime,
         cx: &mut MutableAppContext,
@@ -1957,7 +1960,7 @@ impl language::LocalFile for File {
                     buffer_id,
                     version: serialize_version(version),
                     mtime: Some(mtime.into()),
-                    fingerprint,
+                    fingerprint: serialize_fingerprint(fingerprint),
                     line_ending: serialize_line_ending(line_ending) as i32,
                 })
                 .log_err();