diff --git a/poetry.lock b/poetry.lock
index 4417c749..5fc4cbfe 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 = "e9ad6794ee37fad63cebc601930501325b6c60efea2c751c4d8db39176c313ce"
+content-hash = "c5804e323c77417c8d96abfb18061901fad4ef2e1a01cae6410f2597ea78d607"
diff --git a/pyproject.toml b/pyproject.toml
index ca321cea..94969612 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ boto3 = "1.34.100"
 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"