diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24f9f18..2e73d4d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.15.0] - 2026-02-17
+
+### Added
+- lockfileVersion change detection: when `lockfileVersion` changes in a subspace's pnpm-lock.yaml, all projects in that subspace are treated as having all external deps changed, and all library exports are wildcard-tainted. This propagates transitively through the existing dependency graph and taint analysis.
+- `ParseLockfileVersion` using proper YAML parsing (gopkg.in/yaml.v3) to compare old vs new lockfile versions
+
 ## [0.14.2] - 2026-02-16
 
 ### Added
@@ -176,6 +182,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Multi-stage Docker build
 - Automated vendor upgrade workflow
 
+[0.15.0]: https://github.com/gooddata/gooddata-goodchanges/compare/v0.14.2...v0.15.0
 [0.14.2]: https://github.com/gooddata/gooddata-goodchanges/compare/v0.14.1...v0.14.2
 [0.14.1]: https://github.com/gooddata/gooddata-goodchanges/compare/v0.14.0...v0.14.1
 [0.14.0]: https://github.com/gooddata/gooddata-goodchanges/compare/v0.13.0...v0.14.0
diff --git a/VERSION b/VERSION
index 1c16bd1..7092c7c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.14.2
\ No newline at end of file
+0.15.0
\ No newline at end of file
diff --git a/go.mod b/go.mod
index d830585..540b588 100644
--- a/go.mod
+++ b/go.mod
@@ -16,4 +16,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.40.0 // indirect
 	golang.org/x/text v0.33.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 3ac3cc8..4977dbd 100644
--- a/go.sum
+++ b/go.sum
@@ -20,5 +20,8 @@ golang.org/x/sys v0.40.0 h1:DBZZqJ2Rkml6QMQsZywtnjnnGvHza6BTfYFWY9kjEWQ=
 golang.org/x/sys v0.40.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/text v0.33.0 h1:B3njUFyqtHDUI5jMn1YIr5B0IE2U0qck04r6d4KPAxE=
 golang.org/x/text v0.33.0/go.mod h1:LuMebE6+rBincTi9+xWTY8TztLzKHc/9C1uBCG27+q8=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools/v3 v3.5.2 h1:7koQfIKdy+I8UTetycgUqXWSDwpgv193Ka+qRsmBY8Q=
 gotest.tools/v3 v3.5.2/go.mod h1:LtdLGcnqToBH83WByAAi/wiwSFCArdFIUV/xxN4pcjA=
diff --git a/internal/lockfile/lockfile.go b/internal/lockfile/lockfile.go
index 1213a61..d775f00 100644
--- a/internal/lockfile/lockfile.go
+++ b/internal/lockfile/lockfile.go
@@ -5,6 +5,8 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
+
+	"gopkg.in/yaml.v3"
 )
 
 type depLineInfo struct {
@@ -173,6 +175,28 @@ func countLeadingSpaces(s string) int {
 	return len(s)
 }
 
+// ParseLockfileVersion extracts the lockfileVersion value from pnpm-lock.yaml content
+// using proper YAML parsing.
+func ParseLockfileVersion(content []byte) string {
+	var doc yaml.Node
+	if err := yaml.Unmarshal(content, &doc); err != nil {
+		return ""
+	}
+	if doc.Kind != yaml.DocumentNode || len(doc.Content) == 0 {
+		return ""
+	}
+	mapping := doc.Content[0]
+	if mapping.Kind != yaml.MappingNode {
+		return ""
+	}
+	for i := 0; i < len(mapping.Content)-1; i += 2 {
+		if mapping.Content[i].Value == "lockfileVersion" {
+			return mapping.Content[i+1].Value
+		}
+	}
+	return ""
+}
+
 // parseDiffChangedLines extracts the new-file line numbers of changed lines from a unified diff.
 func parseDiffChangedLines(diffText string) []int {
 	var result []int
diff --git a/main.go b/main.go
index eb2407a..bb6c133 100644
--- a/main.go
+++ b/main.go
@@ -27,6 +27,11 @@ var flagIncludeCSS bool
 var flagLog bool
 var flagDebug bool
 
+type TargetResult struct {
+	Name       string   `json:"name"`
+	Detections []string `json:"detections,omitempty"`
+}
+
 // envBool returns true if the environment variable is set to a non-empty value.
 func envBool(key string) bool {
 	return os.Getenv(key) != ""
@@ -119,7 +124,23 @@ func main() {
 	changedProjects := rush.FindChangedProjects(rushConfig, projectMap, changedFiles, configMap, relevantPackages)
 
 	// Detect lockfile dep changes per subspace (folder → set of changed dep names)
-	depChangedDeps := findLockfileAffectedProjects(rushConfig, mergeBase)
+	depChangedDeps, versionChangedSubspaces := findLockfileAffectedProjects(rushConfig, mergeBase)
+
+	// When lockfileVersion changes in a subspace, treat all projects in that subspace
+	// as having all external deps changed. This feeds into the existing taint propagation:
+	// depChangedDeps → changedProjects → affectedSet → library analysis → target detection.
+	for _, rp := range rushConfig.Projects {
+		subspace := rp.SubspaceName
+		if subspace == "" {
+			subspace = "default"
+		}
+		if versionChangedSubspaces[subspace] {
+			if depChangedDeps[rp.ProjectFolder] == nil {
+				depChangedDeps[rp.ProjectFolder] = make(map[string]bool)
+			}
+			depChangedDeps[rp.ProjectFolder]["*"] = true
+		}
+	}
 
 	// Add dep-affected projects to the changed set (they count as directly changed)
 	for folder := range depChangedDeps {
@@ -164,6 +185,29 @@ func main() {
 	// Track affected exports per package for cross-package propagation.
 	allUpstreamTaint := make(map[string]map[string]bool)
 
+	// Seed upstream taint for libraries in version-changed subspaces.
+	// A lockfileVersion change means we can't reliably diff individual deps,
+	// so treat all exports as tainted. This propagates through the analysis loop.
+	for _, rp := range rushConfig.Projects {
+		subspace := rp.SubspaceName
+		if subspace == "" {
+			subspace = "default"
+		}
+		if !versionChangedSubspaces[subspace] {
+			continue
+		}
+		info := projectMap[rp.PackageName]
+		if info == nil {
+			continue
+		}
+		if analyzer.IsLibrary(info.Package) {
+			if allUpstreamTaint[rp.PackageName] == nil {
+				allUpstreamTaint[rp.PackageName] = make(map[string]bool)
+			}
+			allUpstreamTaint[rp.PackageName]["*"] = true
+		}
+	}
+
 	type pkgResult struct {
 		pkgName  string
 		affected []analyzer.AffectedExport
@@ -300,10 +344,6 @@ func main() {
 	// Load project configs and detect affected targets.
 	// Targets are defined by "type": "target" in .goodchangesrc.json.
 	// Virtual targets are defined by "type": "virtual-target".
-	type TargetResult struct {
-		Name       string   `json:"name"`
-		Detections []string `json:"detections,omitempty"`
-	}
 	changedE2E := make(map[string]*TargetResult)
 
 	for _, rp := range rushConfig.Projects {
@@ -322,7 +362,7 @@ func main() {
 				}
 				// Target detection with 4 conditions:
 				//   1. Direct file changes (outside ignores)
-				//   2. External dep changes in lockfile
+				//   2. External dep changes in lockfile (incl. lockfileVersion wildcard)
 				//   3. Tainted workspace imports
 				//   4. Corresponding app is tainted
 				info := projectMap[rp.PackageName]
@@ -380,6 +420,7 @@ func main() {
 				if len(targetPatterns) > 0 && !matchesTargetFilter(*td.TargetName, targetPatterns) {
 					continue
 				}
+
 				// Virtual target: check changeDirs globs for file changes or tainted imports.
 				// Normal globs trigger a full run; fine-grained globs collect specific affected files.
 				normalTriggered := false
@@ -463,8 +504,10 @@ func main() {
 }
 
 // findLockfileAffectedProjects checks each subspace's pnpm-lock.yaml for dep changes.
-// Returns a map of project folder → set of changed external dep package names.
-func findLockfileAffectedProjects(config *rush.Config, mergeBase string) map[string]map[string]bool {
+// Returns:
+//   - depChanges: project folder → set of changed external dep package names
+//   - versionChanges: subspace name → true for subspaces where lockfileVersion changed
+func findLockfileAffectedProjects(config *rush.Config, mergeBase string) (map[string]map[string]bool, map[string]bool) {
 	// Collect subspaces: "default" for projects without subspaceName, plus named ones
 	subspaces := make(map[string]bool)
 	subspaces["default"] = true
@@ -475,11 +518,26 @@ func findLockfileAffectedProjects(config *rush.Config, mergeBase string) map[str
 	}
 
 	result := make(map[string]map[string]bool)
+	versionChanged := make(map[string]bool)
 	for subspace := range subspaces {
 		lockfilePath := filepath.Join("common", "config", "subspaces", subspace, "pnpm-lock.yaml")
 		if _, err := os.Stat(lockfilePath); err != nil {
 			continue
 		}
+
+		// Compare lockfileVersion between base commit and current
+		newContent, err := os.ReadFile(lockfilePath)
+		if err != nil {
+			continue
+		}
+		oldContent, _ := git.ShowFile(mergeBase, lockfilePath)
+		oldVersion := lockfile.ParseLockfileVersion([]byte(oldContent))
+		newVersion := lockfile.ParseLockfileVersion(newContent)
+		if oldVersion != newVersion {
+			versionChanged[subspace] = true
+			logf("lockfileVersion changed in subspace %q: %q → %q\n", subspace, oldVersion, newVersion)
+		}
+
 		diffText, err := git.DiffSincePath(mergeBase, lockfilePath)
 		if err != nil || diffText == "" {
 			continue
@@ -494,7 +552,7 @@ func findLockfileAffectedProjects(config *rush.Config, mergeBase string) map[str
 			}
 		}
 	}
-	return result
+	return result, versionChanged
 }
 
 // matchesTargetFilter checks if a target name matches any of the given patterns.