diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,3 +12,7 @@
 ## 0.1.2.0 -- 2020-09-16
 
 * Add `authLTI13WithWidget`
+
+## 0.1.2.1 -- 2020-09-16
+
+* No changes
diff --git a/yesod-auth-lti13.cabal b/yesod-auth-lti13.cabal
--- a/yesod-auth-lti13.cabal
+++ b/yesod-auth-lti13.cabal
@@ -1,7 +1,7 @@
 cabal-version:       >=1.10
 
 name:                yesod-auth-lti13
-version:             0.1.2.0
+version:             0.1.2.1
 synopsis:            A yesod-auth plugin for LTI 1.3
 description:         A plugin using <https://hackage.haskell.org/package/lti13>
                      to implement IMS Global LTI 1.3 authentication for
@@ -24,7 +24,8 @@
     -- other-modules:
     -- other-extensions:
     build-depends:       base >=4.12 && <5
-                       , lti13
+                       -- these two are always updated in concert with each other
+                       , lti13                             == 0.1.2.1
                        , base64-bytestring                 >= 1.0.0 && < 1.1
                        , bytestring                        >= 0.10.10 && < 0.11
                        , containers                        >= 0.6.2 && < 0.7