diff --git a/src/Yesod/Csp.hs b/src/Yesod/Csp.hs
--- a/src/Yesod/Csp.hs
+++ b/src/Yesod/Csp.hs
@@ -120,6 +120,7 @@
               | Https
               | UnsafeInline
               | UnsafeEval
+              | StrictDynamic
               | Nonce EscapedText
               | MetaSource Text deriving (Eq, Show, Data, Typeable)
 
@@ -135,6 +136,7 @@
 textSource Https = "https:"
 textSource UnsafeInline = "'unsafe-inline'"
 textSource UnsafeEval = "'unsafe-eval'"
+textSource StrictDynamic = "'strict-dynamic'"
 textSource (MetaSource _) = ""
 textSource (Nonce x) = (pack . show) x
 
diff --git a/src/Yesod/Csp/Example.hs b/src/Yesod/Csp/Example.hs
--- a/src/Yesod/Csp/Example.hs
+++ b/src/Yesod/Csp/Example.hs
@@ -24,6 +24,7 @@
   /9 Example9R GET
   /10 Example10R GET
   /11 Example11R GET
+  /12 Example12R GET
 |]
 
 instance Yesod Example
@@ -138,6 +139,14 @@
       I should only be iframe-able by Google!
     |]
 
+getExample12R :: Handler Html
+getExample12R = do
+  let n = "foo"
+  cspPolicy [csp|script-src strict-dynamic unsafe-inline $nonce-n|]
+  defaultLayout $ [whamlet|
+    <script nonce="foo">
+      alert("ayyyy");
+  |]
 
 -- | Run a webserver to serve these examples at /1, /2, etc.
 runExamples :: IO ()
diff --git a/src/Yesod/Csp/TH.hs b/src/Yesod/Csp/TH.hs
--- a/src/Yesod/Csp/TH.hs
+++ b/src/Yesod/Csp/TH.hs
@@ -54,6 +54,7 @@
          <|> host
          <|> unsafeInline
          <|> unsafeEval
+         <|> strictDynamic
          <|> parseNonce
          <|> metaSource
   where wildcard = string "*" *> pure Wildcard
@@ -84,6 +85,7 @@
             _ -> fail "https"
         unsafeInline = string "unsafe-inline" *> pure UnsafeInline
         unsafeEval = string "unsafe-eval" *> pure UnsafeEval
+        strictDynamic = string "strict-dynamic" *> pure StrictDynamic
 
 separated :: Char -> Bool
 separated x = x == ';' || x == ' '
diff --git a/yesod-csp.cabal b/yesod-csp.cabal
--- a/yesod-csp.cabal
+++ b/yesod-csp.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                yesod-csp
-version:             0.2.3.0
+version:             0.2.4.0
 synopsis:            Add CSP headers to Yesod apps
 description:         Add CSP headers to Yesod apps. This helps reduce exposure to XSS attacks and bad assets.
 license:             MIT