diff --git a/gallery_dl/extractor/warosu.py b/gallery_dl/extractor/warosu.py
index 8e6b842a..3bb635d6 100644
--- a/gallery_dl/extractor/warosu.py
+++ b/gallery_dl/extractor/warosu.py
@@ -90,4 +90,7 @@ class WarosuThreadExtractor(Extractor):
         data["filename"] = text.unquote(extr(
             "", "<").rstrip().rpartition(".")[0])
         extr("<br>", "")
-        data["image"] = self.root + extr("<a href=", ">")
+
+        data["image"] = url = extr("<a href=", ">")
+        if url[0] == "/":
+            data["image"] = self.root + url
diff --git a/test/results/warosu.py b/test/results/warosu.py
index e476b508..efc7f832 100644
--- a/test/results/warosu.py
+++ b/test/results/warosu.py
@@ -13,17 +13,17 @@ __tests__ = (
     "#category": ("", "warosu", "thread"),
     "#class"   : warosu.WarosuThreadExtractor,
     "#urls"    : (
-        "https://warosu.org/data/jp/img/0166/56/1488487280004.png",
-        "https://warosu.org/data/jp/img/0166/56/1488493239417.png",
-        "https://warosu.org/data/jp/img/0166/56/1488493636725.jpg",
-        "https://warosu.org/data/jp/img/0166/56/1488493700040.jpg",
-        "https://warosu.org/data/jp/img/0166/56/1488499585168.jpg",
-        "https://warosu.org/data/jp/img/0166/56/1488530851199.jpg",
-        "https://warosu.org/data/jp/img/0166/56/1488536072155.jpg",
-        "https://warosu.org/data/jp/img/0166/56/1488603426484.png",
-        "https://warosu.org/data/jp/img/0166/56/1488647021253.jpg",
-        "https://warosu.org/data/jp/img/0166/56/1488866825031.jpg",
-        "https://warosu.org/data/jp/img/0166/56/1489094956868.jpg",
+        "https://i.warosu.org/data/jp/img/0166/56/1488487280004.png",
+        "https://i.warosu.org/data/jp/img/0166/56/1488493239417.png",
+        "https://i.warosu.org/data/jp/img/0166/56/1488493636725.jpg",
+        "https://i.warosu.org/data/jp/img/0166/56/1488493700040.jpg",
+        "https://i.warosu.org/data/jp/img/0166/56/1488499585168.jpg",
+        "https://i.warosu.org/data/jp/img/0166/56/1488530851199.jpg",
+        "https://i.warosu.org/data/jp/img/0166/56/1488536072155.jpg",
+        "https://i.warosu.org/data/jp/img/0166/56/1488603426484.png",
+        "https://i.warosu.org/data/jp/img/0166/56/1488647021253.jpg",
+        "https://i.warosu.org/data/jp/img/0166/56/1488866825031.jpg",
+        "https://i.warosu.org/data/jp/img/0166/56/1489094956868.jpg",
     ),
 },
 
@@ -32,7 +32,7 @@ __tests__ = (
     "#category": ("", "warosu", "thread"),
     "#class"   : warosu.WarosuThreadExtractor,
     "#sha1_content" : "d48df0a701e6599312bfff8674f4aa5d4fb8db1c",
-    "#urls"         : "https://warosu.org/data/jp/img/0166/58/1488521824388.jpg",
+    "#urls"         : "https://i.warosu.org/data/jp/img/0166/58/1488521824388.jpg",
     "#count"        : 1,
 
     "board"     : "jp",
@@ -43,7 +43,7 @@ __tests__ = (
     "filename"  : "sadako-vs-kayako-movie-review",
     "fsize"     : "55 KB",
     "h"         : 675,
-    "image"     : "https://warosu.org/data/jp/img/0166/58/1488521824388.jpg",
+    "image"     : "https://i.warosu.org/data/jp/img/0166/58/1488521824388.jpg",
     "name"      : "Anonymous",
     "no"        : 16658073,
     "now"       : "Fri Mar 3 01:17:04 2017",
@@ -58,7 +58,7 @@ __tests__ = (
     "#url"     : "https://warosu.org/ic/thread/4604652",
     "#category": ("", "warosu", "thread"),
     "#class"   : warosu.WarosuThreadExtractor,
-    "#pattern" : r"https://warosu\.org/data/ic/img/0046/04/1590\d{9}\.jpg",
+    "#pattern" : r"https://i.warosu\.org/data/ic/img/0046/04/1590\d{9}\.jpg",
     "#count"   : 133,
 
     "board"     : "ic",
@@ -68,7 +68,7 @@ __tests__ = (
     "filename"  : str,
     "fsize"     : str,
     "h"         : range(200, 3507),
-    "image"     : r"re:https://warosu\.org/data/ic/img/0046/04/1590\d+\.jpg",
+    "image"     : r"re:https://i.warosu\.org/data/ic/img/0046/04/1590\d+\.jpg",
     "name"      : "re:Anonymous|Dhe Specky Spider-Man",
     "no"        : range(4604652, 4620000),
     "now"       : r"re:\w\w\w \w\w\w \d\d \d\d:\d\d:\d\d 2020",