diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # webp
 
+## 0.1.1.0
+
+  * Add `isAnim`
+  * Avoid error/potential segfault on trying to read animated WebP
+
 ## 0.1.0.3
 
   * Fix flipped width/height
diff --git a/src/Codec/Picture/WebP.hs b/src/Codec/Picture/WebP.hs
--- a/src/Codec/Picture/WebP.hs
+++ b/src/Codec/Picture/WebP.hs
@@ -7,26 +7,34 @@
                           , encodeRgba8Lossless
                           , encodeRgb8
                           , encodeRgba8
+                          , isAnim
                           ) where
 
-import           Codec.Picture            (Image (Image), PixelBaseComponent,
-                                           PixelRGB8, PixelRGBA8)
-import           Control.Applicative      (pure, (<*>))
-import qualified Data.ByteString          as BS
-import qualified Data.ByteString.Internal as BS
-import qualified Data.ByteString.Unsafe   as BS
-import           Data.Functor             ((<$>))
-import           Data.Vector.Storable     (Vector, unsafeFromForeignPtr0,
-                                           unsafeWith)
-import           Data.Word                (Word8)
-import           Foreign.C.Types          (CChar, CFloat, CInt, CSize)
-import           Foreign.ForeignPtr       (newForeignPtr)
-import           Foreign.Ptr              (Ptr, castPtr)
-import           System.IO.Unsafe         (unsafePerformIO)
+import           Codec.Picture                (Image (Image),
+                                               PixelBaseComponent, PixelRGB8,
+                                               PixelRGBA8)
+import           Codec.Picture.WebP.Container
+import           Control.Applicative          (pure, (<*>))
+import qualified Data.ByteString              as BS
+import qualified Data.ByteString.Internal     as BS
+import qualified Data.ByteString.Lazy         as BSL
+import qualified Data.ByteString.Unsafe       as BS
+import           Data.Functor                 ((<$>))
+import           Data.Vector.Storable         (Vector, unsafeFromForeignPtr0,
+                                               unsafeWith)
+import           Data.Word                    (Word8)
+import           Foreign.C.Types              (CChar, CFloat, CInt, CSize)
+import           Foreign.ForeignPtr           (newForeignPtr)
+import           Foreign.Ptr                  (Ptr, castPtr)
+import           System.IO.Unsafe             (unsafePerformIO)
 import           WebP.Decode
 import           WebP.Encode
 import           WebP.Types
 
+errAnim :: BS.ByteString -> BS.ByteString
+errAnim inp | isAnim (BSL.fromStrict inp) = error "Animated WebP not supported (nor sensible for JuicyPixels)."
+            | otherwise = inp
+
 decodeRgb8 :: BS.ByteString -> Image PixelRGB8
 decodeRgb8 = decodeJuicyPixels decodeRgb8BS
 
@@ -68,13 +76,11 @@
                   => (BS.ByteString -> (CInt, CInt, BS.ByteString))
                   -> BS.ByteString
                   -> Image p
-decodeJuicyPixels decoder = (\(w, h, img) -> Image (fromIntegral w) (fromIntegral h) (bytesToVec img)) . decoder
+decodeJuicyPixels decoder = (\(w, h, img) -> Image (fromIntegral w) (fromIntegral h) (bytesToVec img)) . decoder . errAnim
     where bytesToVec = \(BS.PS fp _ l) -> unsafeFromForeignPtr0 fp l
 
-decodeRgb8BS :: BS.ByteString -> (CInt, CInt, BS.ByteString)
+decodeRgb8BS, decodeRgba8BS :: BS.ByteString -> (CInt, CInt, BS.ByteString)
 decodeRgb8BS = decodeAbsBS webPDecodeRGB 3
-
-decodeRgba8BS :: BS.ByteString -> (CInt, CInt, BS.ByteString)
 decodeRgba8BS = decodeAbsBS webPDecodeRGBA 4
 
 {-# NOINLINE decodeAbsBS #-}
diff --git a/src/Codec/Picture/WebP/Container.hs b/src/Codec/Picture/WebP/Container.hs
new file mode 100644
--- /dev/null
+++ b/src/Codec/Picture/WebP/Container.hs
@@ -0,0 +1,27 @@
+-- https://stackoverflow.com/a/73170213/11296354
+-- https://developers.google.com/speed/webp/docs/riff_container
+
+{-# LANGUAGE OverloadedStrings #-}
+
+module Codec.Picture.WebP.Container (isAnim) where
+
+import           Control.Monad        (unless)
+import           Data.Binary.Get      (Get, getByteString, runGetOrFail, skip)
+import qualified Data.ByteString.Lazy as BSL
+
+-- | Sniff out animated WebP
+--
+-- @since 0.1.1.0
+isAnim :: BSL.ByteString -> Bool
+isAnim inp = case runGetOrFail getAnim inp of Left (_, _, e) -> error e; Right (_, _, x) -> x
+
+getAnim :: Get Bool
+getAnim = do
+    signature 4 "RIFF" "Expected first four bytes to be RIFF"
+    skip 4
+    signature 4 "WEBP" "Expected WEBP"
+    skip 4 *> skip 14
+    anim <- getByteString 4
+    pure (anim=="ANIM")
+  where
+    signature n bytes err = do {sig <- getByteString n; unless (sig==bytes) (fail err)}
diff --git a/test/Spec.hs b/test/Spec.hs
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -11,6 +11,7 @@
     testGroup "Converts to PNG without throwing an exception"
         [ convRgbPng "test/data/6b3001b4ebfc341ed0359c00586e6ce1.webp"
         , convRgbPng "test/data/d99cc366dfbbf99493f917e2d43c683f.webp"
+        -- , convRgbPng "test/data/tumblr_ddca20a372af5d3c6d38436ffc882f72_99c41c0a_1280.webp"
         , convRgbaPng "test/data/6b3001b4ebfc341ed0359c00586e6ce1.webp"
         , convRgbaPng "test/data/d99cc366dfbbf99493f917e2d43c683f.webp"
         , roundtripLosslessRGB "test/data/6b3001b4ebfc341ed0359c00586e6ce1.webp"
diff --git a/test/data/tumblr_ddca20a372af5d3c6d38436ffc882f72_99c41c0a_1280.webp b/test/data/tumblr_ddca20a372af5d3c6d38436ffc882f72_99c41c0a_1280.webp
new file mode 100644
# file too large to diff: test/data/tumblr_ddca20a372af5d3c6d38436ffc882f72_99c41c0a_1280.webp
diff --git a/webp.cabal b/webp.cabal
--- a/webp.cabal
+++ b/webp.cabal
@@ -1,6 +1,6 @@
 cabal-version:      1.18
 name:               webp
-version:            0.1.0.3
+version:            0.1.1.0
 license:            GPL-3
 license-file:       LICENSE
 copyright:          Copyright: (c) 2020 Vanessa McHale
@@ -31,6 +31,7 @@
     pkgconfig-depends: libwebp >=0.6.1
     hs-source-dirs:    src
     other-modules:
+        Codec.Picture.WebP.Container
         WebP.Encode
         WebP.Decode
         WebP.Types
@@ -42,7 +43,8 @@
         base >=4.7 && <5,
         JuicyPixels >=3.0,
         bytestring,
-        vector >=0.9.1
+        vector >=0.9.1,
+        binary >=0.6.4.0
 
     if !flag(cross)
         build-tool-depends: c2hs:c2hs