diff --git a/AUTHORS.rst b/AUTHORS.rst
index 2923446a..1bd657fb 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -11,3 +11,4 @@ Authors
 * Andreas Rammhold - https://github.com/andir
 * Nicholas Bunn - https://github.com/NicholasBunn
 * Nathan McDougall - https://github.com/nathanjmcdougall
+* Oleksandr Zaiats - https://github.com/z4y4ts
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 07a38ac9..12dc6070 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -9,6 +9,7 @@ latest
 * Improve contribution experience for Windows developers using Just.
 * Tweak Just commands for running version-specific Python tests.
 * Remove `typing-extensions` as a dependency.
+* Make package FIPS compatible by marking blake2 hashing with `usedforsecurity=False`.
 
 3.14 (2025-12-10)
 -----------------
diff --git a/src/grimp/adaptors/caching.py b/src/grimp/adaptors/caching.py
index d717063d..2baa4ac4 100644
--- a/src/grimp/adaptors/caching.py
+++ b/src/grimp/adaptors/caching.py
@@ -37,7 +37,9 @@ def make_data_file_name(
         # Use a hash algorithm with a limited size to avoid cache filenames that are too long
         # the filesystem, which can happen if there are more than a few root packages
         # being analyzed.
-        safe_unicode_identifier = hashlib.blake2b(bytes_identifier, digest_size=20).hexdigest()
+        safe_unicode_identifier = hashlib.blake2b(
+            bytes_identifier, digest_size=20, usedforsecurity=False
+        ).hexdigest()
         return f"{safe_unicode_identifier}.data.json"
 
     @classmethod