diff --git a/INSTALL.md b/INSTALL.md
index c4ccdcc3..1b3ebbae 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -159,13 +159,14 @@ the one in the `config.yaml`, so that client knows how to access the backend!
 server {
     listen 80;
     server_name great.dude;
-    merge_slashes off;  # to support post tags such as ///
 
     location ~ ^/api$ {
         return 302 /api/;
     }
     location ~ ^/api/(.*)$ {
-        proxy_pass http://127.0.0.1:6666/$1$is_args$args;
+        if ($request_uri ~* "/api/(.*)") { # preserve PATH_INFO as-is
+            proxy_pass http://127.0.0.1:6666/$1;
+        }
     }
     location / {
         root /home/rr-/src/maintained/szurubooru/client/public;
diff --git a/client/js/util/uri.js b/client/js/util/uri.js
index 52e90a06..a0482280 100644
--- a/client/js/util/uri.js
+++ b/client/js/util/uri.js
@@ -24,11 +24,11 @@ function formatApiLink(...values) {
 }
 
 function escapeParam(text) {
-    return encodeURIComponent(text).replace(/%/g, '$');
+    return encodeURIComponent(text);
 }
 
 function unescapeParam(text) {
-    return decodeURIComponent(text.replace(/\$/g, '%'));
+    return decodeURIComponent(text);
 }
 
 function formatClientLink(...values) {
diff --git a/server/szurubooru/rest/app.py b/server/szurubooru/rest/app.py
index 0823e6e3..b4d23d42 100644
--- a/server/szurubooru/rest/app.py
+++ b/server/szurubooru/rest/app.py
@@ -31,7 +31,7 @@ def _get_headers(env):
 
 def _create_context(env):
     method = env['REQUEST_METHOD']
-    path = urllib.parse.unquote('/' + env['PATH_INFO'].lstrip('/'))
+    path = '/' + env['PATH_INFO'].lstrip('/')
     headers = _get_headers(env)
 
     files = {}