diff --git a/Cargo.lock b/Cargo.lock
index ce98f3348..464a43e39 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1457,7 +1457,7 @@ dependencies = [
 [[package]]
 name = "fsrs"
 version = "0.1.0"
-source = "git+https://github.com/open-spaced-repetition/fsrs-rs.git?rev=725417fe310b74a719e18c2127f64223be1cb669#725417fe310b74a719e18c2127f64223be1cb669"
+source = "git+https://github.com/open-spaced-repetition/fsrs-rs.git?rev=67163045ba9916e8a41f384fdb5ea414773139bd#67163045ba9916e8a41f384fdb5ea414773139bd"
 dependencies = [
  "burn",
  "itertools 0.11.0",
diff --git a/Cargo.toml b/Cargo.toml
index 70a95a9af..a980bbb88 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,7 @@ rev = "184b2ca50ed39ca43da13f0b830a463861adb9ca"
 
 [workspace.dependencies.fsrs]
 git = "https://github.com/open-spaced-repetition/fsrs-rs.git"
-rev = "725417fe310b74a719e18c2127f64223be1cb669"
+rev = "67163045ba9916e8a41f384fdb5ea414773139bd"
 # path = "../../../fsrs-rs"
 
 [workspace.dependencies]
diff --git a/rslib/src/scheduler/fsrs/memory_state.rs b/rslib/src/scheduler/fsrs/memory_state.rs
index 9720f1c84..f22d8c5a3 100644
--- a/rslib/src/scheduler/fsrs/memory_state.rs
+++ b/rslib/src/scheduler/fsrs/memory_state.rs
@@ -318,7 +318,7 @@ mod tests {
             item.starting_state,
             Some(MemoryState {
                 stability: 99.999954,
-                difficulty: 4.4642887
+                difficulty: 4.46429
             })
         );
         let mut card = Card::default();
@@ -326,8 +326,8 @@ mod tests {
         assert_eq!(
             card.memory_state,
             Some(FsrsMemoryState {
-                stability: 248.47868,
-                difficulty: 4.468946
+                stability: 248.58453,
+                difficulty: 4.4689474
             })
         );
         // but if there's only a single revlog entry, we'll fall back on current card
@@ -351,7 +351,7 @@ mod tests {
             card.memory_state,
             Some(FsrsMemoryState {
                 stability: 122.99994,
-                difficulty: 6.5147324,
+                difficulty: 6.5147333
             })
         );
     }