diff --git a/default.nix b/default.nix
index 0a05de4..5c9eefe 100644
--- a/default.nix
+++ b/default.nix
@@ -1,15 +1,15 @@
-{ mkDerivation, aeson, base, bytestring, hspec, hspec-discover, lib
-, QuickCheck, quickcheck-instances, text, unordered-containers
-, yaml
+{ mkDerivation, aeson, base, bytestring, hspec, hspec-discover
+, HsYAML, HsYAML-aeson, lib, QuickCheck, quickcheck-instances, text
+, unordered-containers
 }:
 mkDerivation {
   pname = "richenv";
-  version = "0.1.0.1";
+  version = "0.1.0.2";
   src = ./.;
   libraryHaskellDepends = [ aeson base text unordered-containers ];
   testHaskellDepends = [
-    aeson base bytestring hspec QuickCheck quickcheck-instances text
-    unordered-containers yaml
+    aeson base bytestring hspec HsYAML HsYAML-aeson QuickCheck
+    quickcheck-instances text unordered-containers
   ];
   testToolDepends = [ hspec-discover ];
   homepage = "https://github.com/DavSanchez/richenv";
diff --git a/richenv.cabal b/richenv.cabal
index dc65893..5a6ec0d 100644
--- a/richenv.cabal
+++ b/richenv.cabal
@@ -21,7 +21,7 @@ name:            richenv
 -- PVP summary:  +-+------- breaking API changes
 --               | | +----- non-breaking API additions
 --               | | | +--- code changes with no API change
-version:         0.1.0.1
+version:         0.1.0.2
 
 -- A short (one-line) description of the package.
 synopsis:        Rich environment variable setup for Haskell
@@ -160,10 +160,11 @@ test-suite richenv-test
     , aeson
     , bytestring            >=0.11   && <0.13
     , hspec                 >=2.10   && <2.12
+    , HsYAML
+    , HsYAML-aeson
     , QuickCheck            >=2.14   && <2.15
     , quickcheck-instances  >=0.3.29 && <0.4
     , richenv
-    , yaml                  >=0.11   && <0.12
 
   -- , process               >=1.6    && <1.7
   build-tool-depends: hspec-discover:hspec-discover
diff --git a/test/RichEnvSpec.hs b/test/RichEnvSpec.hs
index 724877e..f683433 100644
--- a/test/RichEnvSpec.hs
+++ b/test/RichEnvSpec.hs
@@ -1,14 +1,14 @@
 module RichEnvSpec (spec) where
 
 import ArbitraryInstances ()
-import Control.Exception (displayException)
 import Data.Aeson qualified as JSON
 import Data.ByteString qualified as B
 import Data.ByteString.Char8 qualified as C8
 import Data.HashMap.Strict qualified as HM
 import Data.List (sort)
 import Data.Text qualified as T
-import Data.Yaml qualified as Yaml
+import Data.YAML (Pos)
+import Data.YAML.Aeson qualified as Yaml
 import GHC.Generics (Generic)
 import RichEnv (clearEnvironment, setRichEnvFromCurrent, toEnvListFromCurrent)
 import RichEnv.Types (Environment, Mappings (Mappings), Prefixes (Prefixes), RichEnv (..), Values (Values), defaultRichEnv, fromEnvironment, toEnvironment)
@@ -75,9 +75,9 @@ spec = describe "RichEnv ops" $ do
   context "working with YAML" $ it "parses a YAML file into expected results" $ do
     clearEnv
     setTestEnv fileTestsBaseEnv
-    let res = Yaml.decodeEither' yamlTestCase :: Either Yaml.ParseException TestType
+    let res = Yaml.decode1Strict yamlTestCase
     case res of
-      Left err -> fail $ show err
+      Left err -> fail $ "Parse failed. State: " <> show err
       Right actual -> testEnvList fileTestsCaseExpected (environ actual)
 
   context "working with JSON" $ it "parses a JSON file into expected results" $ do
@@ -90,10 +90,11 @@ spec = describe "RichEnv ops" $ do
 
   context "invariants" $ do
     prop "parsing YAML from and to a RichEnv should end in the original value" $ \re -> do
-      let yaml = Yaml.encode re
-          res = Yaml.decodeEither' yaml :: Either Yaml.ParseException RichEnv
+      let yaml = Yaml.encode1Strict re
+      C8.writeFile "./testcase.yaml" yaml
+      let res = Yaml.decode1Strict yaml :: Either (Pos, String) RichEnv
        in case res of
-            Left err -> fail $ displayException err
+            Left err -> fail $ "Parse failed. State: " <> show err
             Right actual -> do
               actual `shouldBe` re
     prop "parsing JSON from and to a RichEnv should end in the original value" $ \re -> do