diff --git a/poetry.lock b/poetry.lock
index a3ee82b8..0e346a05 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -131,13 +131,13 @@ files = [
 
 [[package]]
 name = "certifi"
-version = "2023.11.17"
+version = "2024.7.4"
 description = "Python package for providing Mozilla's CA Bundle."
 optional = false
 python-versions = ">=3.6"
 files = [
-    {file = "certifi-2023.11.17-py3-none-any.whl", hash = "sha256:e036ab49d5b79556f99cfc2d9320b34cfbe5be05c5871b51de9329f0603b0474"},
-    {file = "certifi-2023.11.17.tar.gz", hash = "sha256:9b469f3a900bf28dc19b8cfbf8019bf47f7fdd1a65a1d4ffb98fc14166beb4d1"},
+    {file = "certifi-2024.7.4-py3-none-any.whl", hash = "sha256:c198e21b1289c2ab85ee4e67bb4b4ef3ead0892059901a8d5b622f24a1101e90"},
+    {file = "certifi-2024.7.4.tar.gz", hash = "sha256:5a1e7645bc0ec61a09e26c36f6106dd4cf40c6db3a1fb6352b0244e7fb057c7b"},
 ]
 
 [[package]]
@@ -1550,4 +1550,4 @@ watchdog = ["watchdog (>=2.3)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "~3.10.9"
-content-hash = "a2cff71f06e61b6a5d5dc80dca3cdbaba95da513de26abaf61a35d0edad620f0"
+content-hash = "caa0db479d95061c8ba56fabcd797729ab3f519cf568995929ab4d8c9c7ebaa1"
diff --git a/pyproject.toml b/pyproject.toml
index a938adfb..3e952542 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ boto3 = "1.34.153"
 cachetools = "4.2.4"
 
 # Pinned dependencies
-certifi = "^2023.7.22"       # pinned for security reasons: https://github.com/cds-snc/notification-utils/security/dependabot/22
+certifi = "^2024.0.0"       # pinned for security reasons: https://github.com/cds-snc/notification-utils/security/dependabot/22
 cryptography = "^42.0.3"     # https://github.com/cds-snc/notification-utils/security/dependabot/31
 Flask = "2.3.3"
 Flask-Redis = "0.4.0"