diff --git a/HISTORY.md b/HISTORY.md
index 1245e814..9263f6ed 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -6,19 +6,24 @@ The format is based on [Keep a
 Changelog](https://keepachangelog.com/en/1.0.0/), and this project
 adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [3.1.1](https://github.com/uploadcare/pyuploadcare/compare/v3.1.0...v3.1.1) - TBD
+## [3.2.0](https://github.com/uploadcare/pyuploadcare/compare/v3.1.0...v3.2.0) - TBD
+
 
 ### Changed
 
   - freeze `httpx` dependency for py37+ (`=0.23.0`) to prevent breaking changes in processing files opened in text mode
 
+### Fixed
+
+  - Akamai signed URL generation
+
 ## [3.1.0](https://github.com/uploadcare/pyuploadcare/compare/v3.0.1...v3.1.0) - 2022-10-24
 
 ### Changed
 
   - Bumped `httpx` dependency for py37+
   - Add `follow_redirects` argument for Client request method
-  - Using `allow_redirects` argument is allowed, but will cause a deprecating warning 
+  - Using `allow_redirects` argument is allowed, but will cause a deprecating warning
   - Bumped `black` dependency
 
 ## [3.0.1](https://github.com/uploadcare/pyuploadcare/compare/v3.0.0...v3.0.1) - 2022-10-06
@@ -275,12 +280,12 @@ UnicodeDecodeError: 'ascii' codec can't decode byte 0xc5 ...
   - Widget was updated up to *0.8.1.2*.
 
   - It was invoking `File.store()`, `FileGroup.store()` methods on every model instance saving, e.g.:
-    
+
     ``` python
     photo.title = 'new title'
     photo.save()
     ```
-    
+
     Now it happens while saving by form, namely by calling
     `your_model_form.is_valid()`. There is other thing that can trigger
     storing -- calling `photo.full_clean()` directly.
diff --git a/pyproject.toml b/pyproject.toml
index 6825488e..66d4e266 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pyuploadcare"
-version = "3.1.1"
+version = "3.2.0"
 description = "Python library for Uploadcare.com"
 authors = ["Uploadcare Inc <hello@uploadcare.com>"]
 readme = "README.md"
diff --git a/pyuploadcare/__init__.py b/pyuploadcare/__init__.py
index db309f27..c826dcca 100644
--- a/pyuploadcare/__init__.py
+++ b/pyuploadcare/__init__.py
@@ -1,5 +1,5 @@
 # isort: skip_file
-__version__ = "3.1.1"
+__version__ = "3.2.0"
 
 from pyuploadcare.resources.file import File  # noqa: F401
 from pyuploadcare.resources.file_group import FileGroup  # noqa: F401
diff --git a/pyuploadcare/secure_url.py b/pyuploadcare/secure_url.py
index 2a84979d..035017f0 100644
--- a/pyuploadcare/secure_url.py
+++ b/pyuploadcare/secure_url.py
@@ -1,3 +1,4 @@
+import binascii
 import hashlib
 import hmac
 import time
@@ -26,7 +27,7 @@ def __init__(
         cdn_url: str,
         secret_key: str,
         window: int = 300,
-        hash_algo=hashlib.sha1,
+        hash_algo=hashlib.sha256,
     ):
         self.secret_key = secret_key
         self.cdn_url = cdn_url
@@ -87,7 +88,7 @@ def _build_signature(self, expire: int, acl: str) -> str:
         ]
 
         signature = hmac.new(
-            self.secret_key.encode(),
+            binascii.a2b_hex(self.secret_key.encode()),
             self.field_delimeter.join(hash_source).encode(),
             self.hash_algo,
         ).hexdigest()
diff --git a/tests/functional/test_secure_url.py b/tests/functional/test_secure_url.py
index 0cebf98c..3ff7bd46 100644
--- a/tests/functional/test_secure_url.py
+++ b/tests/functional/test_secure_url.py
@@ -4,9 +4,16 @@
 from pyuploadcare.secure_url import AkamaiSecureUrlBuilder
 
 
+known_secret = (
+    "73636b61519adede42191efe1e73f02a67c7b692e3765f90c250c230be095211"
+)
+
+
 @pytest.mark.freeze_time("2021-10-12")
 def test_generate_secure_url():
-    secure_url_bulder = AkamaiSecureUrlBuilder("cdn.yourdomain.com", "secret")
+    secure_url_bulder = AkamaiSecureUrlBuilder(
+        "cdn.yourdomain.com", known_secret
+    )
     secure_url = secure_url_bulder.build(
         "52da3bfc-7cd8-4861-8b05-126fef7a6994"
     )
@@ -14,13 +21,15 @@ def test_generate_secure_url():
         "https://cdn.yourdomain.com/52da3bfc-7cd8-4861-8b05-126fef7a6994/?token="
         "exp=1633997100~"
         "acl=/52da3bfc-7cd8-4861-8b05-126fef7a6994/~"
-        "hmac=a33cfc66c3e3592e712cdd1f82bd79d51df93b06"
+        "hmac=81852547d9dbd9eefd24bee2cada6eab02244b9013533bc8511511923098df72"
     )
 
 
 @pytest.mark.freeze_time("2021-10-12")
 def test_generate_secure_url_with_transformation():
-    secure_url_bulder = AkamaiSecureUrlBuilder("cdn.yourdomain.com", "secret")
+    secure_url_bulder = AkamaiSecureUrlBuilder(
+        "cdn.yourdomain.com", known_secret
+    )
     secure_url = secure_url_bulder.build(
         "52da3bfc-7cd8-4861-8b05-126fef7a6994/-/resize/640x/other/transformations/"
     )
@@ -29,13 +38,15 @@ def test_generate_secure_url_with_transformation():
         "-/resize/640x/other/transformations/?token="
         "exp=1633997100~"
         "acl=/52da3bfc-7cd8-4861-8b05-126fef7a6994/-/resize/640x/other/transformations/~"
-        "hmac=24d11299339bdf9dcba26c7a5603c7ca63503fda"
+        "hmac=a3ae2b3e3adfcb5d41ca753598e19d17264ac87d2b0b828ccdac5136e63f2f1a"
     )
 
 
 @pytest.mark.freeze_time("2021-10-12")
 def test_client_generate_secure_url():
-    secure_url_bulder = AkamaiSecureUrlBuilder("cdn.yourdomain.com", "secret")
+    secure_url_bulder = AkamaiSecureUrlBuilder(
+        "cdn.yourdomain.com", known_secret
+    )
 
     uploadcare = Uploadcare(
         public_key="public",
@@ -49,5 +60,5 @@ def test_client_generate_secure_url():
         "https://cdn.yourdomain.com/52da3bfc-7cd8-4861-8b05-126fef7a6994/?token="
         "exp=1633997100~"
         "acl=/52da3bfc-7cd8-4861-8b05-126fef7a6994/~"
-        "hmac=a33cfc66c3e3592e712cdd1f82bd79d51df93b06"
+        "hmac=81852547d9dbd9eefd24bee2cada6eab02244b9013533bc8511511923098df72"
     )