diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index fd667ade..a7ae2196 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -101,4 +101,4 @@ jobs:
     - uses: ./.github/actions/setup-go
       with:
         go-version: ${{ matrix.go }}
-    - run: go test -race -cover ./...
+    - run: go test -race -cover -timeout 25m ./...
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 903e4e88..001e688a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,13 @@ file. This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+### Added
+- Added Protocol 28 ingestion support for CAP-0085 (Externally Managed
+  Contract Executables): decode of the new `ContractExecutable` external-ref
+  variant and `SCV_EXECUTABLE_TAG` `SCVal` arm via the regenerated
+  `go-stellar-sdk` XDR. `MaxSupportedProtocolVersion` is already 28
+  ([#205](https://github.com/stellar/stellar-horizon/pull/205)).
+
 ## 27.0.0
 
 **This release adds support for Protocol 27**
diff --git a/go.mod b/go.mod
index 152ffc76..cfd4ee47 100644
--- a/go.mod
+++ b/go.mod
@@ -170,3 +170,5 @@ require (
 	google.golang.org/protobuf v1.36.10
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
+
+replace github.com/stellar/go-stellar-sdk => github.com/sisuresh/go v0.0.0-20260710190330-0ea2619a0d34
diff --git a/go.sum b/go.sum
index 75a8c147..b8a0a66e 100644
--- a/go.sum
+++ b/go.sum
@@ -413,6 +413,8 @@ github.com/shurcooL/httpfs v0.0.0-20230704072500-f1e31cf0ba5c h1:aqg5Vm5dwtvL+Yg
 github.com/shurcooL/httpfs v0.0.0-20230704072500-f1e31cf0ba5c/go.mod h1:owqhoLW1qZoYLZzLnBw+QkPP9WZnjlSWihhxAJC1+/M=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
 github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
+github.com/sisuresh/go v0.0.0-20260710190330-0ea2619a0d34 h1:wNpkdRRQxyIap9BLfN8URsjfOkhWzXoUY7hUuCvO8Nw=
+github.com/sisuresh/go v0.0.0-20260710190330-0ea2619a0d34/go.mod h1:IkcqcrE9UQi7n/1y+MxKB+7qzdjG1T2kGOD7Ss8dqjw=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
 github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
@@ -429,8 +431,6 @@ github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/spf13/viper v1.17.0 h1:I5txKw7MJasPL/BrfkbA0Jyo/oELqVmux4pR/UxOMfI=
 github.com/spf13/viper v1.17.0/go.mod h1:BmMMMLQXSbcHK6KAOiFLz0l5JHrU89OdIRHvsk0+yVI=
-github.com/stellar/go-stellar-sdk v0.6.1-0.20260616165505-26fec7c0e891 h1:Y/PtLm4L4ZHLDI1dXIflRjI5pY+m+KD7FUVFM07tV+E=
-github.com/stellar/go-stellar-sdk v0.6.1-0.20260616165505-26fec7c0e891/go.mod h1:IkcqcrE9UQi7n/1y+MxKB+7qzdjG1T2kGOD7Ss8dqjw=
 github.com/stellar/go-xdr v0.0.0-20260529210834-0bf8f4956364 h1:gOKrfuWdZ92LFlv0TAwgZ7OsWKeBsOMDlGLyFgduI1w=
 github.com/stellar/go-xdr v0.0.0-20260529210834-0bf8f4956364/go.mod h1:If+U9Z1W5xU97VrOgJandQT+2dN7/iOpkCrxBJEyF80=
 github.com/stellar/throttled v2.2.3-0.20190823235211-89d75816f59d+incompatible h1:jMXXAcz6xTarGDQ4VtVbtERogcmDQw4RaE85Cr9CgoQ=