diff --git a/.safety-policy.yml b/.safety-policy.yml
index 98c29af..1eb9416 100644
--- a/.safety-policy.yml
+++ b/.safety-policy.yml
@@ -4,5 +4,12 @@
 security:
     ignore-cvss-severity-below: 0
     ignore-cvss-unknown-severity: False
+    ignore-vulnerabilities:
+        64227:  # Vulnerability found in jinja2 version 3.1.2 - https://data.safetycli.com/v/64227/97c
+            expires: '2024-05-30'
+        67895:  # Vulnerability found in idna version 3.4 - https://data.safetycli.com/v/67895/97c
+            expires: '2024-05-30'
+        66742:  # Vulnerability found in black version 23.12.1 - https://data.safetycli.com/v/66742/97c
+            expires: '2024-05-30'
 
     continue-on-vulnerability-error: False
diff --git a/pyproject.toml b/pyproject.toml
index 6cf4e67..e1d8d0e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,19 +40,19 @@ aiofiles = ">=0.8"              # https://pypi.org/project/aiofiles/#history
 shellingham = ">=1.3.0"         # https://pypi.org/project/shellingham/#history
 
 [tool.poetry.dev-dependencies]
-black = "^23.12"                # https://pypi.org/project/black/#history
-flake8 = "^7.0"                 # https://pypi.org/project/flake8/#history
-isort = "^5.13"                 # https://pypi.org/project/isort/#history
-mypy = "^1.8"                   # https://pypi.org/project/mypy/#history
-pycln = "^2.4"                  # https://pypi.org/project/pycln/#history
-pytest = "^7.4"                 # https://pypi.org/project/pytest/#history
-safety = "^3.0.1"               # https://pypi.org/project/safety/#history
-urllib3 = "~2.1"                # https://pypi.org/project/urllib3/#history
-types-aiofiles = "23.2"         # https://pypi.org/project/types-aiofiles/#history
+black = ">=23.0"                 # https://pypi.org/project/black/#history
+flake8 = ">=7.0"                 # https://pypi.org/project/flake8/#history
+isort = ">=5.13"                 # https://pypi.org/project/isort/#history
+mypy = ">=1.8"                   # https://pypi.org/project/mypy/#history
+pycln = ">=2.4"                  # https://pypi.org/project/pycln/#history
+pytest = ">=7.4"                 # https://pypi.org/project/pytest/#history
+safety = ">=3.0.1"               # https://pypi.org/project/safety/#history
+urllib3 = ">=2.1"                # https://pypi.org/project/urllib3/#history
+types-aiofiles = ">=23.2"        # https://pypi.org/project/types-aiofiles/#history
 # NB: pip installs in .readthedocs.yml need to be kept up-to-date manually
-novella = "^0.2"                # https://pypi.org/project/novella/#history
-pydoc-markdown = "^4.8"         # https://pypi.org/project/pydoc-markdown/#history
-mkdocs-material = "^9.5"        # https://pypi.org/project/mkdocs-material/#history
+novella = ">=0.2"                # https://pypi.org/project/novella/#history
+pydoc-markdown = ">=4.8"         # https://pypi.org/project/pydoc-markdown/#history
+mkdocs-material = ">=9.5"        # https://pypi.org/project/mkdocs-material/#history
 
 [tool.poetry.plugins."slap.plugins.check"]
 changelog = "slap.ext.checks.changelog:ChangelogValidationCheckPlugin"