diff --git a/pyproject.toml b/pyproject.toml
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,11 +8,14 @@ include = ["c3l_membership/static/*", "c
 
 [tool.poetry.dependencies]
 python = ">=3.7.0,<4"
-Flask = "2.0.2"
-Flask-QRcode = "3.0.0"
-Flask-WeasyPrint = "0.6"
-Flask-WTF = "1.0.0"
-email-validator = "1.1.3"
+Flask = "^2.0.2"
+Flask-QRcode = "^3.0.0"
+Flask-WeasyPrint = "^0.6"
+Flask-WTF = "^1.0.0"
+email-validator = "^1.1.3"
+WTForms="^3.0.1"
+WeasyPrint="52.5"
+djhtml = "^1.4.11"
 
 [tool.poetry.dev-dependencies]
 black = "^21.12b0"