diff --git a/pkgs/servers/calibre-web/default.nix b/pkgs/servers/calibre-web/default.nix
index 9e7a9cae1730..1505f6894a65 100644
--- a/pkgs/servers/calibre-web/default.nix
+++ b/pkgs/servers/calibre-web/default.nix
@@ -55,10 +55,12 @@ python3.pkgs.buildPythonApplication rec {
 
     substituteInPlace setup.cfg \
       --replace "cps = calibreweb:main" "calibre-web = calibreweb:main" \
+      --replace "chardet>=3.0.0,<4.1.0" "chardet>=3.0.0,<6" \
       --replace "Flask>=1.0.2,<2.1.0" "Flask>=1.0.2" \
       --replace "Flask-Login>=0.3.2,<0.5.1" "Flask-Login>=0.3.2" \
       --replace "flask-wtf>=0.14.2,<1.1.0" "flask-wtf>=0.14.2" \
       --replace "lxml>=3.8.0,<4.9.0" "lxml>=3.8.0" \
+      --replace "tornado>=4.1,<6.2" "tornado>=4.1,<7" \
       --replace "PyPDF3>=1.0.0,<1.0.7" "PyPDF3>=1.0.0" \
       --replace "requests>=2.11.1,<2.28.0" "requests" \
       --replace "unidecode>=0.04.19,<1.4.0" "unidecode>=0.04.19" \