diff --git a/.github/mergify.yml b/.github/mergify.yml
index c2409fc5..56b6d26c 100644
--- a/.github/mergify.yml
+++ b/.github/mergify.yml
@@ -8,17 +8,12 @@ pull_request_rules:
     conditions:
       - -draft
       - author~=^dependabot(|-preview)\[bot\]$
-      - check-success='build (1.14.x, ubuntu-latest)'
-      - check-success='build (1.15.x, ubuntu-latest)'
       - check-success='build (1.16.x, ubuntu-latest)'
       - check-success='build (1.17.x, ubuntu-latest)'
-      - check-success='build (1.14.x, macos-latest)'
-      - check-success='build (1.15.x, macos-latest)'
       - check-success='build (1.16.x, macos-latest)'
       - check-success='build (1.17.x, macos-latest)'
-      - check-success='lint (1.15.x, ubuntu-latest)'
       - check-success='lint (1.16.x, ubuntu-latest)'
-      - check-success='lint (1.15.x, macos-latest)'
+      - check-success='lint (1.17.x, ubuntu-latest)'
       - check-success='lint (1.16.x, macos-latest)'
       - check-success='lint (1.17.x, macos-latest)'
       - check-success='Analyze (go)'
@@ -32,17 +27,12 @@ pull_request_rules:
   - name: Alert on major version detection
     conditions:
       - author~=^dependabot(|-preview)\[bot\]$
-      - check-success='build (1.14.x, ubuntu-latest)'
-      - check-success='build (1.15.x, ubuntu-latest)'
       - check-success='build (1.16.x, ubuntu-latest)'
       - check-success='build (1.17.x, ubuntu-latest)'
-      - check-success='build (1.14.x, macos-latest)'
-      - check-success='build (1.15.x, macos-latest)'
       - check-success='build (1.16.x, macos-latest)'
       - check-success='build (1.17.x, macos-latest)'
-      - check-success='lint (1.15.x, ubuntu-latest)'
       - check-success='lint (1.16.x, ubuntu-latest)'
-      - check-success='lint (1.15.x, macos-latest)'
+      - check-success='lint (1.17.x, ubuntu-latest)'
       - check-success='lint (1.16.x, macos-latest)'
       - check-success='lint (1.17.x, macos-latest)'
       - check-success='Analyze (go)'
@@ -59,17 +49,12 @@ pull_request_rules:
   - name: Automatic Merge ⬇️ on Approval ✔
     conditions:
       - "#approved-reviews-by>=1"
-      - check-success='build (1.14.x, ubuntu-latest)'
-      - check-success='build (1.15.x, ubuntu-latest)'
       - check-success='build (1.16.x, ubuntu-latest)'
       - check-success='build (1.17.x, ubuntu-latest)'
-      - check-success='build (1.14.x, macos-latest)'
-      - check-success='build (1.15.x, macos-latest)'
       - check-success='build (1.16.x, macos-latest)'
       - check-success='build (1.17.x, macos-latest)'
-      - check-success='lint (1.15.x, ubuntu-latest)'
       - check-success='lint (1.16.x, ubuntu-latest)'
-      - check-success='lint (1.15.x, macos-latest)'
+      - check-success='lint (1.17.x, ubuntu-latest)'
       - check-success='lint (1.16.x, macos-latest)'
       - check-success='lint (1.17.x, macos-latest)'
       - check-success='Analyze (go)'
@@ -258,4 +243,4 @@ pull_request_rules:
   #      summary: |
   #        {% if not check_succeed %}
   #        Your pull request title must follow [Conventional Commit](https://www.conventionalcommits.org/en/v1.0.0/).
-  #        {% endif %}
\ No newline at end of file
+  #        {% endif %}
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 31851c55..ba4a5bf8 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -16,7 +16,7 @@ jobs:
   golangci:
     strategy:
       matrix:
-        go-version: [1.15.x, 1.16.x, 1.17.x]
+        go-version: [1.16.x, 1.17.x]
         os: [macos-latest, ubuntu-latest]
     name: lint
     runs-on: ${{ matrix.os }}
@@ -30,7 +30,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go-version: [ 1.14.x, 1.15.x, 1.16.x, 1.17.x ]
+        go-version: [ 1.16.x, 1.17.x ]
         os: [ macos-latest, ubuntu-latest ]
     runs-on:  ${{ matrix.os }}
     steps:
diff --git a/go.mod b/go.mod
index 5a4bbfd1..6568c588 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/libsv/go-bt/v2
 
-go 1.16
+go 1.17
 
 require (
 	github.com/libsv/go-bk v0.1.5
@@ -9,3 +9,9 @@ require (
 	golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 )
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
+)