diff --git a/src/api/v0/index.js b/src/api/v0/index.js
index 32c7764..c99e526 100644
--- a/src/api/v0/index.js
+++ b/src/api/v0/index.js
@@ -192,7 +192,8 @@ const doVerification = async (data) => {
   const verificationOptions = {
     proxy: {
       hostname: process.env.PROXY_HOSTNAME,
-      policy: (process.env.PROXY_HOSTNAME !== '') ? 'adaptive' : 'never'
+      policy: (process.env.PROXY_HOSTNAME !== '') ? 'adaptive' : 'never',
+      scheme: (process.env.PROXY_SCHEME !== '') ? process.env.PROXY_SCHEME : (process.env.SCHEME !== '') ? process.env.SCHEME : 'https'
     }
   }
 
diff --git a/src/api/v2/keyoxide_profile.js b/src/api/v2/keyoxide_profile.js
index f13a7c2..c009808 100644
--- a/src/api/v2/keyoxide_profile.js
+++ b/src/api/v2/keyoxide_profile.js
@@ -195,7 +195,8 @@ const doVerification = async (data) => {
   const verificationOptions = {
     proxy: {
       hostname: process.env.PROXY_HOSTNAME,
-      policy: (process.env.PROXY_HOSTNAME !== '') ? 'adaptive' : 'never'
+      policy: (process.env.PROXY_HOSTNAME !== '') ? 'adaptive' : 'never',
+      scheme: (process.env.PROXY_SCHEME !== '') ? process.env.PROXY_SCHEME : (process.env.SCHEME !== '') ? process.env.SCHEME : 'https'
     }
   }
 
diff --git a/src/index.js b/src/index.js
index 4e5008e..691e462 100644
--- a/src/index.js
+++ b/src/index.js
@@ -48,6 +48,7 @@ app.set('env', process.env.NODE_ENV || 'production')
 app.engine('pug', pug.__express).set('view engine', 'pug')
 app.set('port', process.env.PORT || 3000)
 app.set('domain', process.env.DOMAIN)
+app.set('scheme', process.env.SCHEME || 'https')
 app.set('keyoxide_version', packageData.version)
 app.set('onion_url', process.env.ONION_URL)
 
@@ -65,7 +66,8 @@ if (app.get('onion_url')) {
 }
 
 app.use(stringReplace({
-  PLACEHOLDER__PROXY_HOSTNAME: process.env.PROXY_HOSTNAME || process.env.DOMAIN || 'null'
+  PLACEHOLDER__PROXY_HOSTNAME: process.env.PROXY_HOSTNAME || process.env.DOMAIN || 'null',
+  PLACEHOLDER__PROXY_SCHEME: process.env.PROXY_SCHEME || process.env.SCHEME || 'https'
 }, {
   contentTypeFilterRegexp: /application\/javascript/
 }))
diff --git a/src/server/index.js b/src/server/index.js
index 06ad467..c348a13 100644
--- a/src/server/index.js
+++ b/src/server/index.js
@@ -46,7 +46,7 @@ const generateWKDProfile = async (id) => {
       keyData = processKeyData(keyData)
 
       const keyoxideData = {}
-      keyoxideData.url = `https://${process.env.DOMAIN}/wkd/${id}`
+      keyoxideData.url = `${process.env.SCHEME}://${process.env.DOMAIN}/wkd/${id}`
 
       logger.debug('Generating a WKD profile',
         { component: 'wkd_profile_generator', action: 'done', profile_id: id })
@@ -88,9 +88,9 @@ const generateHKPProfile = async (id, keyserverDomain) => {
 
       const keyoxideData = {}
       if (!keyserverDomain || keyserverDomain === 'keys.openpgp.org') {
-        keyoxideData.url = `https://${process.env.DOMAIN}/hkp/${id}`
+        keyoxideData.url = `${process.env.SCHEME}://${process.env.DOMAIN}/hkp/${id}`
       } else {
-        keyoxideData.url = `https://${process.env.DOMAIN}/hkp/${keyserverDomain}/${id}`
+        keyoxideData.url = `${process.env.SCHEME}://${process.env.DOMAIN}/hkp/${keyserverDomain}/${id}`
       }
 
       logger.debug('Generating a HKP profile',
@@ -196,7 +196,7 @@ const generateKeybaseProfile = async (username, fingerprint) => {
       keyData = processKeyData(keyData)
 
       const keyoxideData = {}
-      keyoxideData.url = `https://${process.env.DOMAIN}/keybase/${username}/${fingerprint}`
+      keyoxideData.url = `${process.env.SCHEME}://${process.env.DOMAIN}/keybase/${username}/${fingerprint}`
 
       logger.debug('Generating a Keybase profile',
         { component: 'keybase_profile_generator', action: 'done', username, fingerprint })
diff --git a/static-src/kx-claim.js b/static-src/kx-claim.js
index fa4ab83..5db2adf 100644
--- a/static-src/kx-claim.js
+++ b/static-src/kx-claim.js
@@ -49,7 +49,8 @@ export class Claim extends HTMLElement {
         await claim.verify({
             proxy: {
                 policy: 'adaptive',
-                hostname: 'PLACEHOLDER__PROXY_HOSTNAME'
+                hostname: 'PLACEHOLDER__PROXY_HOSTNAME',
+                scheme: 'PLACEHOLDER__PROXY_SCHEME'
             }
         });
         this.setAttribute('data-claim', JSON.stringify(claim));
@@ -192,7 +193,7 @@ export class Claim extends HTMLElement {
             const subsection_info_text = subsection_info.appendChild(document.createElement('div'));
 
             const result_proxyUsed = subsection_info_text.appendChild(document.createElement('p'));
-            result_proxyUsed.innerHTML = `A proxy was used to fetch the proof: <a href="https://PLACEHOLDER__PROXY_HOSTNAME" aria-label="Link to proxy server">PLACEHOLDER__PROXY_HOSTNAME</a>`;
+            result_proxyUsed.innerHTML = `A proxy was used to fetch the proof: <a href="PLACEHOLDER__PROXY_SCHEME://PLACEHOLDER__PROXY_HOSTNAME" aria-label="Link to proxy server">PLACEHOLDER__PROXY_HOSTNAME</a>`;
         }
 
         // TODO Display errors
@@ -217,4 +218,4 @@ export class Claim extends HTMLElement {
         //     });
         // }
     }
-}
\ No newline at end of file
+}
diff --git a/static-src/utils.js b/static-src/utils.js
index 50e21b5..98135cb 100644
--- a/static-src/utils.js
+++ b/static-src/utils.js
@@ -46,19 +46,20 @@ export async function computeWKDLocalPart(localPart) {
 // Generate Keyoxide profile URL
 export async function generateProfileURL(data) {
     let hostname = data.hostname || window.location.hostname;
+    let scheme = data.scheme || window.location.protocol.slice(0,-1);
 
     if (data.input == "") {
         return "Waiting for input…";
     }
     switch (data.source) {
         case "wkd":
-            return `https://${hostname}/${data.input}`;
+            return `${scheme}://${hostname}/${data.input}`;
             break;
         case "hkp":
             if (/.*@.*\..*/.test(data.input)) {
-                return `https://${hostname}/hkp/${data.input}`;
+                return `${scheme}://${hostname}/hkp/${data.input}`;
             } else {
-                return `https://${hostname}/${data.input}`;
+                return `${scheme}://${hostname}/${data.input}`;
             }
             break;
         case "keybase":
@@ -67,7 +68,7 @@ export async function generateProfileURL(data) {
                 return "Incorrect Keybase public key URL.";
             }
             const match = data.input.match(re);
-            return `https://${hostname}/keybase/${match[1]}/${match[2]}`;
+            return `${scheme}://${hostname}/keybase/${match[1]}/${match[2]}`;
             break;
     }
 }
@@ -240,4 +241,4 @@ export async function verifyBcryptHash(input, hash) {
     } catch (_) {
         return false;
     }
-}
\ No newline at end of file
+}