diff --git a/Cslib/Computability/Languages/MyhillNerode.lean b/Cslib/Computability/Languages/MyhillNerode.lean
index e42d3d3254..9823cbe595 100644
--- a/Cslib/Computability/Languages/MyhillNerode.lean
+++ b/Cslib/Computability/Languages/MyhillNerode.lean
@@ -154,8 +154,7 @@ theorem dfa_num_state_min {State : Type} {M : DA.FinAcc State α} [Finite State]
     apply hne
     simpa using Quotient.sound h
   have h1 := dfa_num_state_ge hws rfl
-  rw [Nat.card_congr (Equiv.ofInjective _ Quotient.out_injective).symm] at h1
-  assumption
+  rwa [Nat.card_congr (Equiv.ofInjective _ Quotient.out_injective).symm] at h1
 
 end Language
 
diff --git a/lake-manifest.json b/lake-manifest.json
index 381f3888fc..931a3fb395 100644
--- a/lake-manifest.json
+++ b/lake-manifest.json
@@ -5,10 +5,10 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "e06eff5f95374108acfaf19f1ff7473aa7771df2",
+   "rev": "950d27063f377d5ccd80d3eeedcebe319d3eb821",
    "name": "mathlib",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "e06eff5f95374108acfaf19f1ff7473aa7771df2",
+   "inputRev": "950d27063f377d5ccd80d3eeedcebe319d3eb821",
    "inherited": false,
    "configFile": "lakefile.lean"},
   {"url": "https://github.com/leanprover-community/plausible",
@@ -35,7 +35,7 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "d8823026ac7ef130c253089d95685f9877b95323",
+   "rev": "e6f3c9cd0408a0024ba182319984f6243752cf4d",
    "name": "importGraph",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",
@@ -75,7 +75,7 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "7e23602c91bc04586b2b06de2708a041853e4681",
+   "rev": "4cac2177c37f5530c4da76aa8e4307f3fc9e4dcb",
    "name": "batteries",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",
diff --git a/lakefile.toml b/lakefile.toml
index 7e4e4eb3b0..7e3bbf520f 100644
--- a/lakefile.toml
+++ b/lakefile.toml
@@ -18,7 +18,7 @@ weak.linter.unicodeLinter = false
 [[require]]
 name = "mathlib"
 scope = "leanprover-community"
-rev = "e06eff5f95374108acfaf19f1ff7473aa7771df2"
+rev = "950d27063f377d5ccd80d3eeedcebe319d3eb821"
 
 [[lean_lib]]
 name = "Cslib"