diff --git a/package-lock.json b/package-lock.json
index ff0190af..daffe28d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4467,14 +4467,6 @@
             }
           }
         },
-        "string_decoder": {
-          "version": "1.0.1",
-          "bundled": true,
-          "dev": true,
-          "requires": {
-            "safe-buffer": "5.0.1"
-          }
-        },
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
@@ -4485,6 +4477,14 @@
             "strip-ansi": "3.0.1"
           }
         },
+        "string_decoder": {
+          "version": "1.0.1",
+          "bundled": true,
+          "dev": true,
+          "requires": {
+            "safe-buffer": "5.0.1"
+          }
+        },
         "stringstream": {
           "version": "0.0.5",
           "bundled": true,
@@ -10643,15 +10643,6 @@
       "integrity": "sha1-J5siXfHVgrH1TmWt3UNS4Y+qBxM=",
       "dev": true
     },
-    "string_decoder": {
-      "version": "1.0.3",
-      "resolved": "http://registry.npm.taobao.org/string_decoder/download/string_decoder-1.0.3.tgz",
-      "integrity": "sha1-D8Z9fBQYJd6UKC3VNr7GubzoYKs=",
-      "dev": true,
-      "requires": {
-        "safe-buffer": "5.1.1"
-      }
-    },
     "string-length": {
       "version": "1.0.1",
       "resolved": "http://registry.npm.taobao.org/string-length/download/string-length-1.0.1.tgz",
@@ -10700,6 +10691,15 @@
       "integrity": "sha1-aybpvTr8qnvjtCabUm3huCAArHg=",
       "dev": true
     },
+    "string_decoder": {
+      "version": "1.0.3",
+      "resolved": "http://registry.npm.taobao.org/string_decoder/download/string_decoder-1.0.3.tgz",
+      "integrity": "sha1-D8Z9fBQYJd6UKC3VNr7GubzoYKs=",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "5.1.1"
+      }
+    },
     "stringstream": {
       "version": "0.0.5",
       "resolved": "http://registry.npm.taobao.org/stringstream/download/stringstream-0.0.5.tgz",
diff --git a/requirements.txt b/requirements.txt
index 030b0986..c54435a7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-aiohttp>=2.0.7
+aiohttp<=2.2.0
 jinja2>=2.9.0
 sockjs>=0.6.0
 hoedown