diff --git a/Cargo.lock b/Cargo.lock
index a7b3a87..e75f4a0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -726,7 +726,7 @@ checksum = "aa9a19cbb55df58761df49b23516a86d432839add4af60fc256da840f66ed35b"
 
 [[package]]
 name = "fsrs"
-version = "0.6.2"
+version = "0.6.4"
 dependencies = [
  "burn",
  "chrono",
@@ -745,7 +745,7 @@ dependencies = [
 
 [[package]]
 name = "fsrs-browser"
-version = "0.6.2"
+version = "0.6.3"
 dependencies = [
  "burn",
  "console_error_panic_hook",
diff --git a/Cargo.toml b/Cargo.toml
index 8decf3a..871d363 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "fsrs-browser"
-version = "0.6.2"
+version = "0.6.3"
 edition = "2021"
 authors = ["Open Spaced Repetition"]
 categories = ["algorithms", "science"]
diff --git a/fsrs-rs b/fsrs-rs
index 14a6284..66ea262 160000
--- a/fsrs-rs
+++ b/fsrs-rs
@@ -1 +1 @@
-Subproject commit 14a62849af95a0df0f97cc1251390d03a1dda19c
+Subproject commit 66ea26247e73fb4a1b28cf6fcfa9a91ddee51b2f