diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 7ea568c..8866e5f 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -49,7 +49,7 @@ checkmark indicating that you are sure it is dealt with (be that by irrelevance)
 
 - Record your changes
 
-  - [ ] I added an entry to the [changelog](https://github.com/serokell/universum/tree/master/CHANGES.md) if my changes are visible to the users
+  - [ ] I added an entry to the [changelog](https://github.com/serokell/universum/tree/master/CHANGES.md) (creating the `Unreleased` section if necessary) if my changes are visible to the users
         and
   - [ ] provided a migration guide for breaking changes if possible
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 66bfdad..d82aaf7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,29 +31,33 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        cabal: ["3.6"]
+        cabal: ["3.8"]
         # If you update this list of supported compiler versions,
         # make sure to update the `tested-with` section of `universum.cabal`.
         ghc:
-          - "8.6.5"
           - "8.8.4"
           - "8.10.7"
-          - "9.0.1"
-          - "9.2.2"
+          - "9.0.2"
+          - "9.2.8"
+          - "9.4.5"
         # Use only the latest compiler on non-Linux
         exclude:
           - os: macOS-latest
-            ghc: 9.0.1
+            ghc: 9.2.8
+          - os: macOS-latest
+            ghc: 9.0.2
           - os: macOS-latest
             ghc: 8.8.4
           - os: macOS-latest
-            ghc: 8.6.5
+            ghc: 8.10.7
+          - os: windows-latest
+            ghc: 9.2.8
           - os: windows-latest
-            ghc: 9.0.1
+            ghc: 9.0.2
           - os: windows-latest
             ghc: 8.8.4
           - os: windows-latest
-            ghc: 8.6.5
+            ghc: 8.10.7
 
     steps:
     - uses: actions/checkout@v3
@@ -91,8 +95,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        stack: ["2.7"]
-        ghc: ["9.0.2"]
+        stack: ["2.9.3"]
+        ghc: ["9.4.5"]
 
     steps:
     - uses: actions/checkout@v3
diff --git a/CHANGES.md b/CHANGES.md
index f14a9ef..e1e1d60 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,8 +1,17 @@
+1.8.2
+=====
+
+* [#289](https://github.com/serokell/universum/pull/289):
+  Make universum work with LTS-21.0.
+  * Re-export `(~)` type operator.
+* [#283](https://github.com/serokell/universum/pull/283):
+  Bump the upper version bound on `text` to `2.0.2`.
+
 1.8.1.1
 =======
 
 * [#282](https://github.com/serokell/universum/pull/282):
-  Bump version bound on `text` to `2.0.1`.
+  Bump the upper version bound on `text` to `2.0.1`.
 
 1.8.1
 =====
diff --git a/src/Universum/Base.hs b/src/Universum/Base.hs
index 6b657fd..a191be8 100644
--- a/src/Universum/Base.hs
+++ b/src/Universum/Base.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP          #-}
 {-# LANGUAGE BangPatterns #-}
 {-# LANGUAGE Unsafe       #-}
 
@@ -24,6 +25,9 @@ module Universum.Base
        , module Data.Proxy
        , module Data.Typeable
        , module Data.Void
+#if MIN_VERSION_base(4,17,0)
+       , module Data.Type.Equality
+#endif
 
        , module GHC.Base
        , module GHC.Enum
@@ -67,6 +71,9 @@ import Data.Traversable (Traversable (..), fmapDefault, foldMapDefault, forM, ma
 import Data.Proxy (Proxy (..))
 import Data.Typeable (Typeable)
 import Data.Void (Void, absurd, vacuous)
+#if MIN_VERSION_base(4,17,0)
+import Data.Type.Equality (type (~))
+#endif
 
 import GHC.Base (String, asTypeOf, maxInt, minInt, ord, seq)
 import GHC.Enum (Bounded (..), Enum (..), boundedEnumFrom, boundedEnumFromThen)
diff --git a/src/Universum/Container/Class.hs b/src/Universum/Container/Class.hs
index 3a483cd..81b1246 100644
--- a/src/Universum/Container/Class.hs
+++ b/src/Universum/Container/Class.hs
@@ -231,9 +231,13 @@ instance FromList (NonEmpty a) where
 
 instance FromList IntSet
 instance Ord a => FromList (Set a)
-instance (Eq k, Hashable k) => FromList (HashMap k v)
 instance FromList (IntMap v)
 instance Ord k => FromList (Map k v)
+#if MIN_VERSION_hashable(1,4,0)
+instance (Hashable k) => FromList (HashMap k v)
+#else
+instance (Eq k, Hashable k) => FromList (HashMap k v)
+#endif
 
 instance FromList T.Text
 instance FromList TL.Text
@@ -575,7 +579,11 @@ instance Ord v => Container (Set v) where
     notElem = Set.notMember
     {-# INLINE notElem #-}
 
+#if MIN_VERSION_hashable(1,4,0)
+instance (Hashable v) => Container (HashSet v) where
+#else
 instance (Eq v, Hashable v) => Container (HashSet v) where
+#endif
     elem = HashSet.member
     {-# INLINE elem #-}
 
diff --git a/src/Universum/Monad/Container.hs b/src/Universum/Monad/Container.hs
index 64b89cc..355daf1 100644
--- a/src/Universum/Monad/Container.hs
+++ b/src/Universum/Monad/Container.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP          #-}
 {-# LANGUAGE Trustworthy  #-}
 {-# LANGUAGE TypeFamilies #-}
 
@@ -18,6 +19,9 @@ import Control.Applicative (Applicative (pure))
 import Data.Function ((.))
 import Data.Traversable (Traversable (traverse))
 import Prelude (Bool (..), Monoid, flip)
+#if MIN_VERSION_base(4,17,0)
+import Data.Type.Equality (type (~))
+#endif
 
 import Universum.Base (IO)
 import Universum.Container (Container, Element, fold, toList)
diff --git a/src/Universum/String/Conversion.hs b/src/Universum/String/Conversion.hs
index acf77a5..d9a3c9f 100644
--- a/src/Universum/String/Conversion.hs
+++ b/src/Universum/String/Conversion.hs
@@ -34,7 +34,10 @@ import Data.Function (id, (.))
 import Data.Maybe (Maybe)
 import Data.String (String)
 import qualified Data.Text.Internal as T
+
+#if !MIN_VERSION_text(2,0,2)
 import qualified Data.Text.Internal.Fusion.Common as TF
+#endif
 
 import Universum.Functor ((<$>))
 import Universum.String.Reexport (ByteString, IsString, Read, Text, fromString)
diff --git a/src/Universum/VarArg.hs b/src/Universum/VarArg.hs
index 18f7cae..c9c687b 100644
--- a/src/Universum/VarArg.hs
+++ b/src/Universum/VarArg.hs
@@ -1,9 +1,11 @@
+{-# LANGUAGE CPP                    #-}
 {-# LANGUAGE FlexibleContexts       #-}
 {-# LANGUAGE FlexibleInstances      #-}
 {-# LANGUAGE FunctionalDependencies #-}
 {-# LANGUAGE MultiParamTypeClasses  #-}
 {-# LANGUAGE Safe                   #-}
 {-# LANGUAGE TypeFamilies           #-}
+{-# LANGUAGE TypeOperators          #-}
 {-# LANGUAGE UndecidableInstances   #-}
 
 -- | Provides operator of variable-arguments function composition.
@@ -12,6 +14,10 @@ module Universum.VarArg
        ( SuperComposition(..)
        ) where
 
+#if MIN_VERSION_base(4,17,0)
+import Data.Type.Equality (type (~))
+#endif
+
 -- $setup
 -- >>> import Universum.Base ((+))
 -- >>> import Universum.Container (null)
diff --git a/stack.yaml b/stack.yaml
index 583ba6b..bb875e4 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1 +1 @@
-resolver: lts-19.0
+resolver: lts-21.0
diff --git a/stack.yaml.lock b/stack.yaml.lock
index c3e0aa0..ad1be6c 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -6,7 +6,7 @@
 packages: []
 snapshots:
 - completed:
-    size: 616897
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/19/0.yaml
-    sha256: bbf2be02f17940bac1f87cb462d4fb0c3355de6dcfc53d84f4f9ad3ee2164f65
-  original: lts-19.0
+    sha256: 1867d84255dff8c87373f5dd03e5a5cb1c10a99587e26c8793e750c54e83ffdc
+    size: 639139
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/21/0.yaml
+  original: lts-21.0
diff --git a/universum.cabal b/universum.cabal
index 22c0e5f..f23e429 100644
--- a/universum.cabal
+++ b/universum.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.2
 name:                universum
-version:             1.8.1.1
+version:             1.8.2
 synopsis:            Custom prelude used in Serokell
 description:         See README.md file for more details.
 homepage:            https://github.com/serokell/universum
@@ -13,11 +13,11 @@ category:            Prelude
 stability:           stable
 build-type:          Simple
 bug-reports:         https://github.com/serokell/universum/issues
-tested-with:         GHC == 8.6.5
-                   , GHC == 8.8.4
+tested-with:         GHC == 8.8.4
                    , GHC == 8.10.7
-                   , GHC == 9.0.1
-                   , GHC == 9.2.2
+                   , GHC == 9.0.2
+                   , GHC == 9.2.8
+                   , GHC == 9.4.5
 extra-doc-files:     CHANGES.md
                    , CONTRIBUTING.md
                    , README.md
@@ -48,6 +48,8 @@ common common-options
 
   default-language:    Haskell2010
 
+  default-extensions:  TypeOperators
+
 library
   import:              common-options
   hs-source-dirs:      src