diff --git a/pkg/lockfile/fixtures/yarn/with-build-string.v1.lock b/pkg/lockfile/fixtures/yarn/with-build-string.v1.lock
new file mode 100644
index 0000000000..b95d9494c6
--- /dev/null
+++ b/pkg/lockfile/fixtures/yarn/with-build-string.v1.lock
@@ -0,0 +1,13 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"domino@https://github.com/angular/domino.git#f2435fe1f9f7c91ade0bd472c4723e5eacd7d19a":
+  version "2.1.6+git"
+  resolved "git+ssh://git@github.com/angular/domino.git"
+  integrity sha512-1D4hj4hN9Q3Coi+gXZjFlxrm+7Jkhe/WBWU6loAQ/BqDWDRYwqQB1YkKbCVvfaVJXAB8OM2sae7KMyqM69pfRQ==
+
+tslib@^2.3.0:
+  version "2.6.2"
+  resolved "https://registry.npmjs.org/tslib/-/tslib-2.6.2.tgz"
+  integrity sha512-AEYxH93jGFPn/a2iVAwW87VuUIkR1FVUKB77NwMF7nBTDkDrrT/Hpt/IrCJ0QXhW27jTBDcf5ZY7w6RiqTMw2Q==
diff --git a/pkg/lockfile/fixtures/yarn/with-build-string.v2.lock b/pkg/lockfile/fixtures/yarn/with-build-string.v2.lock
new file mode 100644
index 0000000000..de6dd4ef4b
--- /dev/null
+++ b/pkg/lockfile/fixtures/yarn/with-build-string.v2.lock
@@ -0,0 +1,29 @@
+# This file is generated by running "yarn install" inside your project.
+# Manual changes might be lost - proceed with caution!
+
+__metadata:
+  version: 6
+  cacheKey: 8
+
+"domino@https://github.com/angular/domino.git#f2435fe1f9f7c91ade0bd472c4723e5eacd7d19a":
+  version: 2.1.6+git
+  resolution: "domino@https://github.com/angular/domino.git#commit=f2435fe1f9f7c91ade0bd472c4723e5eacd7d19a"
+  checksum: 0d9cacf8fd9ee104b9608dd1bb309520db40026e9b31533f3de5994a779bddbf0865820b67bc735c7dcb8067497c35835eb14c1656c31e0679d250f1cfd41073
+  languageName: node
+  linkType: hard
+
+"tslib@npm:^2.3.0":
+  version: 2.6.2
+  resolution: "tslib@npm:2.6.2"
+  checksum: 329ea56123005922f39642318e3d1f0f8265d1e7fcb92c633e0809521da75eeaca28d2cf96d7248229deb40e5c19adf408259f4b9640afd20d13aecc1430f3ad
+  languageName: node
+  linkType: hard
+
+"zone.js@workspace:.":
+  version: 0.0.0-use.local
+  resolution: "zone.js@workspace:."
+  dependencies:
+    domino: "https://github.com/angular/domino.git#f2435fe1f9f7c91ade0bd472c4723e5eacd7d19a"
+    tslib: ^2.3.0
+  languageName: unknown
+  linkType: soft
diff --git a/pkg/lockfile/fixtures/yarn/versions-with-build-strings.v1.lock b/pkg/lockfile/fixtures/yarn/with-prerelease.v1.lock
similarity index 100%
rename from pkg/lockfile/fixtures/yarn/versions-with-build-strings.v1.lock
rename to pkg/lockfile/fixtures/yarn/with-prerelease.v1.lock
diff --git a/pkg/lockfile/fixtures/yarn/versions-with-build-strings.v2.lock b/pkg/lockfile/fixtures/yarn/with-prerelease.v2.lock
similarity index 100%
rename from pkg/lockfile/fixtures/yarn/versions-with-build-strings.v2.lock
rename to pkg/lockfile/fixtures/yarn/with-prerelease.v2.lock
diff --git a/pkg/lockfile/parse-yarn-lock-v1_test.go b/pkg/lockfile/parse-yarn-lock-v1_test.go
index 80e26797d9..c2363e739c 100644
--- a/pkg/lockfile/parse-yarn-lock-v1_test.go
+++ b/pkg/lockfile/parse-yarn-lock-v1_test.go
@@ -183,10 +183,10 @@ func TestParseYarnLock_v1_ScopedPackages(t *testing.T) {
 	})
 }
 
-func TestParseYarnLock_v1_VersionsWithBuildString(t *testing.T) {
+func TestParseYarnLock_v1_WithPrerelease(t *testing.T) {
 	t.Parallel()
 
-	packages, err := lockfile.ParseYarnLock("fixtures/yarn/versions-with-build-strings.v1.lock")
+	packages, err := lockfile.ParseYarnLock("fixtures/yarn/with-prerelease.v1.lock")
 
 	if err != nil {
 		t.Errorf("Got unexpected error: %v", err)
@@ -226,6 +226,31 @@ func TestParseYarnLock_v1_VersionsWithBuildString(t *testing.T) {
 	})
 }
 
+func TestParseYarnLock_v1_WithBuildString(t *testing.T) {
+	t.Parallel()
+
+	packages, err := lockfile.ParseYarnLock("fixtures/yarn/with-build-string.v1.lock")
+
+	if err != nil {
+		t.Errorf("Got unexpected error: %v", err)
+	}
+
+	expectPackages(t, packages, []lockfile.PackageDetails{
+		{
+			Name:      "domino",
+			Version:   "2.1.6+git",
+			Ecosystem: lockfile.YarnEcosystem,
+			CompareAs: lockfile.YarnEcosystem,
+		},
+		{
+			Name:      "tslib",
+			Version:   "2.6.2",
+			Ecosystem: lockfile.YarnEcosystem,
+			CompareAs: lockfile.YarnEcosystem,
+		},
+	})
+}
+
 func TestParseYarnLock_v1_Commits(t *testing.T) {
 	t.Parallel()
 
diff --git a/pkg/lockfile/parse-yarn-lock-v2_test.go b/pkg/lockfile/parse-yarn-lock-v2_test.go
index 23d66ba2a8..55959faecc 100644
--- a/pkg/lockfile/parse-yarn-lock-v2_test.go
+++ b/pkg/lockfile/parse-yarn-lock-v2_test.go
@@ -158,10 +158,10 @@ func TestParseYarnLock_v2_ScopedPackages(t *testing.T) {
 	})
 }
 
-func TestParseYarnLock_v2_VersionsWithBuildString(t *testing.T) {
+func TestParseYarnLock_v2_WithPrerelease(t *testing.T) {
 	t.Parallel()
 
-	packages, err := lockfile.ParseYarnLock("fixtures/yarn/versions-with-build-strings.v2.lock")
+	packages, err := lockfile.ParseYarnLock("fixtures/yarn/with-prerelease.v2.lock")
 
 	if err != nil {
 		t.Errorf("Got unexpected error: %v", err)
@@ -189,6 +189,38 @@ func TestParseYarnLock_v2_VersionsWithBuildString(t *testing.T) {
 	})
 }
 
+func TestParseYarnLock_v2_WithBuildString(t *testing.T) {
+	t.Parallel()
+
+	packages, err := lockfile.ParseYarnLock("fixtures/yarn/with-build-string.v2.lock")
+
+	if err != nil {
+		t.Errorf("Got unexpected error: %v", err)
+	}
+
+	expectPackages(t, packages, []lockfile.PackageDetails{
+		{
+			Name:      "domino",
+			Version:   "2.1.6+git",
+			Commit:    "f2435fe1f9f7c91ade0bd472c4723e5eacd7d19a",
+			Ecosystem: lockfile.YarnEcosystem,
+			CompareAs: lockfile.YarnEcosystem,
+		},
+		{
+			Name:      "tslib",
+			Version:   "2.6.2",
+			Ecosystem: lockfile.YarnEcosystem,
+			CompareAs: lockfile.YarnEcosystem,
+		},
+		{
+			Name:      "zone.js",
+			Version:   "0.0.0-use.local",
+			Ecosystem: lockfile.YarnEcosystem,
+			CompareAs: lockfile.YarnEcosystem,
+		},
+	})
+}
+
 func TestParseYarnLock_v2_Commits(t *testing.T) {
 	t.Parallel()
 
diff --git a/pkg/lockfile/parse-yarn-lock.go b/pkg/lockfile/parse-yarn-lock.go
index 5c764c7b5b..43e6836403 100644
--- a/pkg/lockfile/parse-yarn-lock.go
+++ b/pkg/lockfile/parse-yarn-lock.go
@@ -65,7 +65,7 @@ func extractYarnPackageName(str string) string {
 }
 
 func determineYarnPackageVersion(group []string) string {
-	re := cachedregexp.MustCompile(`^ {2}"?version"?:? "?([\w-.]+)"?$`)
+	re := cachedregexp.MustCompile(`^ {2}"?version"?:? "?([\w-.+]+)"?$`)
 
 	for _, s := range group {
 		matched := re.FindStringSubmatch(s)