diff --git a/free-category.cabal b/free-category.cabal
index 28188ae..e693396 100644
--- a/free-category.cabal
+++ b/free-category.cabal
@@ -11,7 +11,7 @@ category:       Algebra, Control, Monads, Category
 homepage:       https://github.com/coot/free-category#readme
 bug-reports:    https://github.com/coot/free-category/issues
 author:         Marcin Szamotulski
-maintainer:     profunctor@pm.me
+maintainer:     coot@coot.me
 copyright:      (c) 2018-2019 Marcin Szamotulski
 license:        MPL-2.0
 license-file:   LICENSE
@@ -23,7 +23,7 @@ extra-source-files:
     bench/report-O1.md
     bench/report-O2.md
 stability:      experimental
-tested-with:    GHC==8.6.5, GHC==8.8.3, GHC==8.10.1
+tested-with:    GHC==8.6.5, GHC==8.8.4, GHC==8.10.2
 
 source-repository head
   type: git
diff --git a/nix/sources.json b/nix/sources.json
index bf83668..424d443 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -5,10 +5,10 @@
         "homepage": "https://input-output-hk.github.io/haskell.nix",
         "owner": "input-output-hk",
         "repo": "haskell.nix",
-        "rev": "32baaac4d7858ae3349c1f6d1452371f998c7f49",
-        "sha256": "0g0jh0jwips3qyxs7rb1d4qvqs6rralnq318x5x2wvy1mkzvxvlg",
+        "rev": "7cff00d149d9587f37b70e5ea5c6f63817ae6b66",
+        "sha256": "1fgb5d43hmivwd3k46yp393ya6gmy5pzqv4avghiq0mclq1cikhd",
         "type": "tarball",
-        "url": "https://github.com/input-output-hk/haskell.nix/archive/32baaac4d7858ae3349c1f6d1452371f998c7f49.tar.gz",
+        "url": "https://github.com/input-output-hk/haskell.nix/archive/7cff00d149d9587f37b70e5ea5c6f63817ae6b66.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "iohk-nix": {
@@ -17,10 +17,10 @@
         "homepage": null,
         "owner": "input-output-hk",
         "repo": "iohk-nix",
-        "rev": "00788ac974a517846dba09bd5e095757011cb083",
-        "sha256": "0lxffzd31a359d7j9q0vwaj6d5lq0ka5df6g0g30rm91sw7jkpnj",
+        "rev": "f2dee151a917aac96121246ed76fb17e3f9026b0",
+        "sha256": "1d8ygzczk4zbzz04j1yrwzbfld59bc6a6ar7bmlfx1j5m6fhjb8k",
         "type": "tarball",
-        "url": "https://github.com/input-output-hk/iohk-nix/archive/00788ac974a517846dba09bd5e095757011cb083.tar.gz",
+        "url": "https://github.com/input-output-hk/iohk-nix/archive/f2dee151a917aac96121246ed76fb17e3f9026b0.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "niv": {
@@ -29,10 +29,10 @@
         "homepage": "https://github.com/nmattia/niv",
         "owner": "nmattia",
         "repo": "niv",
-        "rev": "372f96bff217a7a019de27667d04118cffa9841b",
-        "sha256": "1l0z6162zw60pdcdj03aq64qgf1vyzmf24i9pxca64i4sprl1b7p",
+        "rev": "9d35b9e4837ab88517210b1701127612c260eccf",
+        "sha256": "0q50xhnm8g2yfyakrh0nly4swyygxpi0a8cb9gp65wcakcgvzvdh",
         "type": "tarball",
-        "url": "https://github.com/nmattia/niv/archive/372f96bff217a7a019de27667d04118cffa9841b.tar.gz",
+        "url": "https://github.com/nmattia/niv/archive/9d35b9e4837ab88517210b1701127612c260eccf.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }