diff --git a/server/manifest.toml b/server/manifest.toml
index 4e5d259..a1c0d93 100644
--- a/server/manifest.toml
+++ b/server/manifest.toml
@@ -15,7 +15,7 @@ packages = [
   { name = "gleam_json", version = "3.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_json", source = "hex", outer_checksum = "44FDAA8847BE8FC48CA7A1C089706BD54BADCC4C45B237A992EDDF9F2CDB2836" },
   { name = "gleam_otp", version = "1.2.0", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "gleam_otp", source = "hex", outer_checksum = "BA6A294E295E428EC1562DC1C11EA7530DCB981E8359134BEABC8493B7B2258E" },
   { name = "gleam_stdlib", version = "0.70.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "86949BF5D1F0E4AC0AB5B06F235D8A5CC11A2DFC33BF22F752156ED61CA7D0FF" },
-  { name = "gleam_time", version = "1.7.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_time", source = "hex", outer_checksum = "56DB0EF9433826D3B99DB0B4AF7A2BFED13D09755EC64B1DAAB46F804A9AD47D" },
+  { name = "gleam_time", version = "1.8.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_time", source = "hex", outer_checksum = "533D8723774D61AD4998324F5DD1DABDCDBFABAFB9E87CB5D03C6955448FC97D" },
   { name = "gleam_yielder", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_yielder", source = "hex", outer_checksum = "8E4E4ECFA7982859F430C57F549200C7749823C106759F4A19A78AEA6687717A" },
   { name = "glearray", version = "2.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "glearray", source = "hex", outer_checksum = "5E272F7CB278CC05A929C58DEB58F5D5AC6DB5B879A681E71138658D0061C38A" },
   { name = "gleeunit", version = "1.9.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "DA9553CE58B67924B3C631F96FE3370C49EB6D6DC6B384EC4862CC4AAA718F3C" },
diff --git a/server/src/subway_gleam/server/route/stop.gleam b/server/src/subway_gleam/server/route/stop.gleam
index 112bf14..c3fc7ca 100644
--- a/server/src/subway_gleam/server/route/stop.gleam
+++ b/server/src/subway_gleam/server/route/stop.gleam
@@ -194,8 +194,7 @@ pub fn filter_alerts(
 
       let after_start = case period.start {
         option.Some(start) -> {
-          let start =
-            util.timestamp_subtract(start, alert.display_before_active)
+          let start = timestamp.subtract(start, alert.display_before_active)
           timestamp.compare(start, current_time) != order.Gt
         }
         option.None -> True
diff --git a/shared/src/subway_gleam/shared/util.gleam b/shared/src/subway_gleam/shared/util.gleam
index 06bb1c4..c2c3c34 100644
--- a/shared/src/subway_gleam/shared/util.gleam
+++ b/shared/src/subway_gleam/shared/util.gleam
@@ -22,12 +22,3 @@ pub fn min_from(
   |> result.unwrap(0.0)
   |> float.round
 }
-
-// See <https://github.com/gleam-lang/time/issues/41>
-pub fn timestamp_subtract(
-  timestamp: timestamp.Timestamp,
-  duration: duration.Duration,
-) -> timestamp.Timestamp {
-  let negated_duration = duration.difference(duration, duration.seconds(0))
-  timestamp.add(timestamp, negated_duration)
-}