diff --git a/homeassistant/core.py b/homeassistant/core.py
index 7003b87ce67..b2525e2f096 100644
--- a/homeassistant/core.py
+++ b/homeassistant/core.py
@@ -871,7 +871,7 @@ class Event:
         self.origin = origin
         self.time_fired = time_fired or dt_util.utcnow()
         self.context: Context = context or Context(
-            id=ulid_util.ulid(dt_util.utc_to_timestamp(self.time_fired))
+            id=ulid_util.ulid_at_time(dt_util.utc_to_timestamp(self.time_fired))
         )
 
     def as_dict(self) -> dict[str, Any]:
@@ -1533,7 +1533,7 @@ class StateMachine:
         now = dt_util.utcnow()
 
         if context is None:
-            context = Context(id=ulid_util.ulid(dt_util.utc_to_timestamp(now)))
+            context = Context(id=ulid_util.ulid_at_time(dt_util.utc_to_timestamp(now)))
         state = State(
             entity_id,
             new_state,
diff --git a/homeassistant/package_constraints.txt b/homeassistant/package_constraints.txt
index 4a00b05d21b..5d05bec39c4 100644
--- a/homeassistant/package_constraints.txt
+++ b/homeassistant/package_constraints.txt
@@ -44,6 +44,7 @@ requests==2.28.1
 scapy==2.5.0
 sqlalchemy==2.0.4
 typing-extensions>=4.5.0,<5.0
+ulid-transform==0.3.1
 voluptuous-serialize==2.6.0
 voluptuous==0.13.1
 yarl==1.8.1
diff --git a/homeassistant/util/ulid.py b/homeassistant/util/ulid.py
index d40b0f48e16..304a42ec610 100644
--- a/homeassistant/util/ulid.py
+++ b/homeassistant/util/ulid.py
@@ -1,21 +1,11 @@
 """Helpers to generate ulids."""
 from __future__ import annotations
 
-from random import getrandbits
 import time
 
+from ulid_transform import ulid_at_time, ulid_hex
 
-def ulid_hex() -> str:
-    """Generate a ULID in lowercase hex that will work for a UUID.
-
-    This ulid should not be used for cryptographically secure
-    operations.
-
-    This string can be converted with https://github.com/ahawker/ulid
-
-    ulid.from_uuid(uuid.UUID(ulid_hex))
-    """
-    return f"{int(time.time()*1000):012x}{getrandbits(80):020x}"
+__all__ = ["ulid", "ulid_hex", "ulid_at_time"]
 
 
 def ulid(timestamp: float | None = None) -> str:
@@ -35,41 +25,4 @@ def ulid(timestamp: float | None = None) -> str:
     import ulid
     ulid.parse(ulid_util.ulid())
     """
-    ulid_bytes = int((timestamp or time.time()) * 1000).to_bytes(
-        6, byteorder="big"
-    ) + int(getrandbits(80)).to_bytes(10, byteorder="big")
-
-    # This is base32 crockford encoding with the loop unrolled for performance
-    #
-    # This code is adapted from:
-    # https://github.com/ahawker/ulid/blob/06289583e9de4286b4d80b4ad000d137816502ca/ulid/base32.py#L102
-    #
-    enc = "0123456789ABCDEFGHJKMNPQRSTVWXYZ"
-    return (
-        enc[(ulid_bytes[0] & 224) >> 5]
-        + enc[ulid_bytes[0] & 31]
-        + enc[(ulid_bytes[1] & 248) >> 3]
-        + enc[((ulid_bytes[1] & 7) << 2) | ((ulid_bytes[2] & 192) >> 6)]
-        + enc[((ulid_bytes[2] & 62) >> 1)]
-        + enc[((ulid_bytes[2] & 1) << 4) | ((ulid_bytes[3] & 240) >> 4)]
-        + enc[((ulid_bytes[3] & 15) << 1) | ((ulid_bytes[4] & 128) >> 7)]
-        + enc[(ulid_bytes[4] & 124) >> 2]
-        + enc[((ulid_bytes[4] & 3) << 3) | ((ulid_bytes[5] & 224) >> 5)]
-        + enc[ulid_bytes[5] & 31]
-        + enc[(ulid_bytes[6] & 248) >> 3]
-        + enc[((ulid_bytes[6] & 7) << 2) | ((ulid_bytes[7] & 192) >> 6)]
-        + enc[(ulid_bytes[7] & 62) >> 1]
-        + enc[((ulid_bytes[7] & 1) << 4) | ((ulid_bytes[8] & 240) >> 4)]
-        + enc[((ulid_bytes[8] & 15) << 1) | ((ulid_bytes[9] & 128) >> 7)]
-        + enc[(ulid_bytes[9] & 124) >> 2]
-        + enc[((ulid_bytes[9] & 3) << 3) | ((ulid_bytes[10] & 224) >> 5)]
-        + enc[ulid_bytes[10] & 31]
-        + enc[(ulid_bytes[11] & 248) >> 3]
-        + enc[((ulid_bytes[11] & 7) << 2) | ((ulid_bytes[12] & 192) >> 6)]
-        + enc[(ulid_bytes[12] & 62) >> 1]
-        + enc[((ulid_bytes[12] & 1) << 4) | ((ulid_bytes[13] & 240) >> 4)]
-        + enc[((ulid_bytes[13] & 15) << 1) | ((ulid_bytes[14] & 128) >> 7)]
-        + enc[(ulid_bytes[14] & 124) >> 2]
-        + enc[((ulid_bytes[14] & 3) << 3) | ((ulid_bytes[15] & 224) >> 5)]
-        + enc[ulid_bytes[15] & 31]
-    )
+    return ulid_at_time(timestamp or time.time())
diff --git a/pyproject.toml b/pyproject.toml
index a3d6d2f2446..7a0aff9ce9a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,6 +50,7 @@ dependencies    = [
     "pyyaml==6.0",
     "requests==2.28.1",
     "typing-extensions>=4.5.0,<5.0",
+    "ulid-transform==0.3.1",
     "voluptuous==0.13.1",
     "voluptuous-serialize==2.6.0",
     "yarl==1.8.1",
diff --git a/requirements.txt b/requirements.txt
index aa6e85d1520..31831a93e2a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,6 +24,7 @@ python-slugify==4.0.1
 pyyaml==6.0
 requests==2.28.1
 typing-extensions>=4.5.0,<5.0
+ulid-transform==0.3.1
 voluptuous==0.13.1
 voluptuous-serialize==2.6.0
 yarl==1.8.1