diff --git a/src/clients/add/SamlSignature.tsx b/src/clients/add/SamlSignature.tsx
index 29c7c860d8..435576fb58 100644
--- a/src/clients/add/SamlSignature.tsx
+++ b/src/clients/add/SamlSignature.tsx
@@ -25,18 +25,21 @@ const SIGNATURE_ALGORITHMS = [
 const KEYNAME_TRANSFORMER = ["NONE", "KEY_ID", "CERT_SUBJECT"] as const;
 
 const CANONICALIZATION = [
-  { name: "EXCLUSIVE", value: "http://www.w3.org/2001/10/xml-exc-c14n#" },
+  {
+    name: "EXCLUSIVE",
+    value: "https://www.w3.org/TR/2002/REC-xml-exc-c14n-20020718/",
+  },
   {
     name: "EXCLUSIVE_WITH_COMMENTS",
-    value: "http://www.w3.org/2001/10/xml-exc-c14n#WithComments",
+    value: "https://www.w3.org/TR/2002/REC-xml-exc-c14n-20020718/#WithComments",
   },
   {
     name: "INCLUSIVE",
-    value: "http://www.w3.org/TR/2001/REC-xml-c14n-20010315",
+    value: "https://www.w3.org/TR/2001/REC-xml-c14n-20010315",
   },
   {
     name: "INCLUSIVE_WITH_COMMENTS",
-    value: "http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments",
+    value: "https://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments",
   },
 ] as const;
 
diff --git a/src/realm-settings/security-defences/HeadersForm.tsx b/src/realm-settings/security-defences/HeadersForm.tsx
index 0c53b4b600..ca57678cd7 100644
--- a/src/realm-settings/security-defences/HeadersForm.tsx
+++ b/src/realm-settings/security-defences/HeadersForm.tsx
@@ -30,31 +30,31 @@ export const HeadersForm = ({ save, reset }: HeadersFormProps) => {
     >
       <HelpLinkTextInput
         fieldName="browserSecurityHeaders.xFrameOptions"
-        url="http://tools.ietf.org/html/rfc7034"
+        url="https://datatracker.ietf.org/doc/html/rfc7034"
       />
       <HelpLinkTextInput
         fieldName="browserSecurityHeaders.contentSecurityPolicy"
-        url="http://www.w3.org/TR/CSP/"
+        url="https://www.w3.org/TR/CSP/"
       />
       <HelpLinkTextInput
         fieldName="browserSecurityHeaders.contentSecurityPolicyReportOnly"
-        url="http://www.w3.org/TR/CSP/"
+        url="https://www.w3.org/TR/CSP/"
       />
       <HelpLinkTextInput
         fieldName="browserSecurityHeaders.xContentTypeOptions"
-        url="https://www.owasp.org/index.php/List_of_useful_HTTP_headers"
+        url="https://owasp.org/index.php/List_of_useful_HTTP_headers"
       />
       <HelpLinkTextInput
         fieldName="browserSecurityHeaders.xRobotsTag"
-        url="https://developers.google.com/webmasters/control-crawl-index/docs/robots_meta_tag"
+        url="https://developers.google.com/search/docs/advanced/robots/robots_meta_tag"
       />
       <HelpLinkTextInput
         fieldName="browserSecurityHeaders.xXSSProtection"
-        url="https://www.owasp.org/index.php/OWASP_Secure_Headers_Project#xxxsp"
+        url="https://owasp.org/www-project-secure-headers/#xxxsp"
       />
       <HelpLinkTextInput
         fieldName="browserSecurityHeaders.strictTransportSecurity"
-        url="https://www.owasp.org/index.php/OWASP_Secure_Headers_Project#hsts"
+        url="https://owasp.org/www-project-secure-headers/#hsts"
       />
 
       <ActionGroup>