diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index 9dcf223..b287541 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -47,9 +47,9 @@ jobs:
             compilerVersion: 9.4.5
             setup-method: ghcup
             allow-failure: false
-          - compiler: ghc-9.2.7
+          - compiler: ghc-9.2.8
             compilerKind: ghc
-            compilerVersion: 9.2.7
+            compilerVersion: 9.2.8
             setup-method: ghcup
             allow-failure: false
           - compiler: ghc-9.0.2
@@ -57,16 +57,6 @@ jobs:
             compilerVersion: 9.0.2
             setup-method: ghcup
             allow-failure: false
-          - compiler: ghc-8.10.7
-            compilerKind: ghc
-            compilerVersion: 8.10.7
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-8.8.4
-            compilerKind: ghc
-            compilerVersion: 8.8.4
-            setup-method: ghcup
-            allow-failure: false
       fail-fast: false
     steps:
       - name: apt
@@ -251,34 +241,16 @@ jobs:
           rm -f cabal.project.local
       - name: constraint set servant-0.20
         run: |
-          if [ $((HCNUMVER >= 81000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.20.*' all --dry-run ; fi
-          if [ $((HCNUMVER >= 81000)) -ne 0 ] ; then cabal-plan topo | sort ; fi
-          if [ $((HCNUMVER >= 81000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.20.*' --dependencies-only -j2 all ; fi
-          if [ $((HCNUMVER >= 81000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.20.*' all ; fi
+          $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.20.*' all --dry-run
+          cabal-plan topo | sort
+          $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.20.*' --dependencies-only -j2 all
+          $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.20.*' all
       - name: constraint set servant-0.19
         run: |
           if [ $((HCNUMVER < 90600)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.19.*' all --dry-run ; fi
           if [ $((HCNUMVER < 90600)) -ne 0 ] ; then cabal-plan topo | sort ; fi
           if [ $((HCNUMVER < 90600)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.19.*' --dependencies-only -j2 all ; fi
           if [ $((HCNUMVER < 90600)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.19.*' all ; fi
-      - name: constraint set servant-0.18
-        run: |
-          if [ $((HCNUMVER < 90000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.18.*' all --dry-run ; fi
-          if [ $((HCNUMVER < 90000)) -ne 0 ] ; then cabal-plan topo | sort ; fi
-          if [ $((HCNUMVER < 90000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.18.*' --dependencies-only -j2 all ; fi
-          if [ $((HCNUMVER < 90000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.18.*' all ; fi
-      - name: constraint set servant-0.17
-        run: |
-          if [ $((HCNUMVER < 81000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.17.*' all --dry-run ; fi
-          if [ $((HCNUMVER < 81000)) -ne 0 ] ; then cabal-plan topo | sort ; fi
-          if [ $((HCNUMVER < 81000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.17.*' --dependencies-only -j2 all ; fi
-          if [ $((HCNUMVER < 81000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.17.*' all ; fi
-      - name: constraint set servant-0.16
-        run: |
-          if [ $((HCNUMVER < 81000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.16.*' all --dry-run ; fi
-          if [ $((HCNUMVER < 81000)) -ne 0 ] ; then cabal-plan topo | sort ; fi
-          if [ $((HCNUMVER < 81000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.16.*' --dependencies-only -j2 all ; fi
-          if [ $((HCNUMVER < 81000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='servant ==0.16.*' all ; fi
       - name: save cache
         uses: actions/cache/save@v4
         if: always()
diff --git a/cabal.haskell-ci b/cabal.haskell-ci
index 714ca83..b67b41b 100644
--- a/cabal.haskell-ci
+++ b/cabal.haskell-ci
@@ -1,17 +1,5 @@
 branches: master
 
-constraint-set servant-0.16
-  ghc: >= 8.0 && <8.10
-  constraints: servant ==0.16.*
-
-constraint-set servant-0.17
-  ghc: >= 8.0 && <8.10
-  constraints: servant ==0.17.*
-
-constraint-set servant-0.18
-  ghc: >= 8.6 && <9.0
-  constraints: servant ==0.18.*
-
 constraint-set servant-0.19
   ghc: >= 8.6 && <9.6
   constraints: servant ==0.19.*
diff --git a/servant-swagger-ui-core/servant-swagger-ui-core.cabal b/servant-swagger-ui-core/servant-swagger-ui-core.cabal
index befdeae..524e11d 100644
--- a/servant-swagger-ui-core/servant-swagger-ui-core.cabal
+++ b/servant-swagger-ui-core/servant-swagger-ui-core.cabal
@@ -19,10 +19,8 @@ license:            BSD3
 license-file:       LICENSE
 build-type:         Simple
 tested-with:
-  GHC ==8.8.4
-   || ==8.10.7
-   || ==9.0.2
-   || ==9.2.7
+  GHC ==9.0.2
+   || ==9.2.8
    || ==9.4.5
    || ==9.6.6
    || ==9.8.2
@@ -37,7 +35,7 @@ library
   hs-source-dirs:   src
   ghc-options:      -Wall
   build-depends:
-      base                 >=4.7      && <4.21
+      base                 >=4.15.1.0 && <4.21
     , aeson                >=0.8.0.2  && <2.3
     , blaze-markup         >=0.7.0.2  && <0.9
     , bytestring           >=0.10.4.0 && <0.13
diff --git a/servant-swagger-ui-example/servant-swagger-ui-example.cabal b/servant-swagger-ui-example/servant-swagger-ui-example.cabal
index 875434f..0fb47a9 100644
--- a/servant-swagger-ui-example/servant-swagger-ui-example.cabal
+++ b/servant-swagger-ui-example/servant-swagger-ui-example.cabal
@@ -14,10 +14,8 @@ license:       BSD3
 license-file:  LICENSE
 build-type:    Simple
 tested-with:
-  GHC ==8.8.4
-   || ==8.10.7
-   || ==9.0.2
-   || ==9.2.7
+  GHC ==9.0.2
+   || ==9.2.8
    || ==9.4.5
    || ==9.6.6
    || ==9.8.2
@@ -31,7 +29,7 @@ executable servant-swagger-ui-example
   ghc-options:      -threaded
   build-depends:
       aeson                        >=0.8.0.2  && <2.3
-    , base                         >=4.7      && <4.21
+    , base                         >=4.15.1.0 && <4.21
     , base-compat                  >=0.9.3    && <0.15
     , lens                         >=4.7.0.1  && <5.4
     , servant
diff --git a/servant-swagger-ui-jensoleg/servant-swagger-ui-jensoleg.cabal b/servant-swagger-ui-jensoleg/servant-swagger-ui-jensoleg.cabal
index e2baa13..db436c7 100644
--- a/servant-swagger-ui-jensoleg/servant-swagger-ui-jensoleg.cabal
+++ b/servant-swagger-ui-jensoleg/servant-swagger-ui-jensoleg.cabal
@@ -18,10 +18,8 @@ license:            BSD3
 license-file:       LICENSE
 build-type:         Simple
 tested-with:
-  GHC ==8.8.4
-   || ==8.10.7
-   || ==9.0.2
-   || ==9.2.7
+  GHC ==9.0.2
+   || ==9.2.8
    || ==9.4.5
    || ==9.6.6
    || ==9.8.2
@@ -86,7 +84,7 @@ library
   ghc-options:      -Wall
   build-depends:    servant-swagger-ui-core >=0.3.5 && <0.4
   build-depends:
-      base             >=4.7      && <4.21
+      base             >=4.15.1.0 && <4.21
     , aeson            >=0.8.0.2  && <2.3
     , bytestring       >=0.10.4.0 && <0.13
     , file-embed-lzma  >=0.1      && <0.2
diff --git a/servant-swagger-ui-redoc/servant-swagger-ui-redoc.cabal b/servant-swagger-ui-redoc/servant-swagger-ui-redoc.cabal
index 4a323a8..84d9fc4 100644
--- a/servant-swagger-ui-redoc/servant-swagger-ui-redoc.cabal
+++ b/servant-swagger-ui-redoc/servant-swagger-ui-redoc.cabal
@@ -18,10 +18,8 @@ license:            BSD3
 license-file:       LICENSE
 build-type:         Simple
 tested-with:
-  GHC ==8.8.4
-   || ==8.10.7
-   || ==9.0.2
-   || ==9.2.7
+  GHC ==9.0.2
+   || ==9.2.8
    || ==9.4.5
    || ==9.6.6
    || ==9.8.2
@@ -40,7 +38,7 @@ library
   ghc-options:      -Wall
   build-depends:    servant-swagger-ui-core >=0.3.5 && <0.4
   build-depends:
-      base             >=4.7      && <4.21
+      base             >=4.15.1.0 && <4.21
     , aeson            >=0.8.0.2  && <2.3
     , bytestring       >=0.10.4.0 && <0.13
     , file-embed-lzma  >=0.1      && <0.2
diff --git a/servant-swagger-ui/servant-swagger-ui.cabal b/servant-swagger-ui/servant-swagger-ui.cabal
index 8feed3c..efc9241 100644
--- a/servant-swagger-ui/servant-swagger-ui.cabal
+++ b/servant-swagger-ui/servant-swagger-ui.cabal
@@ -18,10 +18,8 @@ license:            BSD3
 license-file:       LICENSE
 build-type:         Simple
 tested-with:
-  GHC ==8.8.4
-   || ==8.10.7
-   || ==9.0.2
-   || ==9.2.7
+  GHC ==9.0.2
+   || ==9.2.8
    || ==9.4.5
    || ==9.6.6
    || ==9.8.2
@@ -56,7 +54,7 @@ library
   ghc-options:      -Wall
   build-depends:    servant-swagger-ui-core >=0.3.5 && <0.4
   build-depends:
-      base             >=4.7      && <4.21
+      base             >=4.15.1.0 && <4.21
     , aeson            >=0.8.0.2  && <2.3
     , bytestring       >=0.10.4.0 && <0.13
     , file-embed-lzma  >=0.1      && <0.2