diff --git a/cmd/juju/application/deployer/deployer.go b/cmd/juju/application/deployer/deployer.go
index ac9cc938a21..8209df64849 100644
--- a/cmd/juju/application/deployer/deployer.go
+++ b/cmd/juju/application/deployer/deployer.go
@@ -266,6 +266,10 @@ func (d *factory) maybeReadLocalBundle() (Deployer, error) {
 	if err != nil {
 		return nil, errors.Annotate(err, "cannot deploy bundle")
 	}
+	if err = handleUnmarshallError(ds.Parts()); err != nil && !d.force {
+		return nil, errors.Annotate(err, "cannot deploy bundle, invalid fields")
+	}
+
 	if err := d.validateBundleFlags(); err != nil {
 		return nil, errors.Trace(err)
 	}
@@ -284,6 +288,22 @@ func (d *factory) maybeReadLocalBundle() (Deployer, error) {
 	return &localBundle{deployBundle: db}, nil
 }
 
+func handleUnmarshallError(parts []*charm.BundleDataPart) error {
+	messages := set.NewStrings()
+	for _, part := range parts {
+		if part == nil {
+			continue
+		}
+		if part.UnmarshallError != nil {
+			messages.Add(part.UnmarshallError.Error())
+		}
+	}
+	if messages.IsEmpty() {
+		return nil
+	}
+	return errors.New(strings.Join(messages.Values(), "\n"))
+}
+
 // newDeployBundle returns the config needed to eventually call
 // deployBundle.deploy.  This is used by all types of bundles to
 // be deployed
diff --git a/cmd/juju/application/deployer/deployer_test.go b/cmd/juju/application/deployer/deployer_test.go
index 5759d73620f..1488fb5c0f1 100644
--- a/cmd/juju/application/deployer/deployer_test.go
+++ b/cmd/juju/application/deployer/deployer_test.go
@@ -235,6 +235,54 @@ func (s *deployerSuite) TestGetDeployerLocalBundle(c *gc.C) {
 	c.Assert(deployer.String(), gc.Equals, fmt.Sprintf("deploy local bundle from: %s", bundlePath))
 }
 
+func (s *deployerSuite) TestGetDeployerLocalBundleStrict(c *gc.C) {
+	defer s.setupMocks(c).Finish()
+
+	_, err := s.testGetDeployerLocalBundleStrict(c, false)
+	c.Assert(err.Error(), gc.Equals, ("cannot deploy bundle, invalid fields: unmarshal document 0: yaml: unmarshal errors:\n  line 3: field descriptn not found in bundle\n  line 8: field contstraints not found in applications"))
+}
+
+func (s *deployerSuite) TestGetDeployerLocalBundleStrictUseForce(c *gc.C) {
+	defer s.setupMocks(c).Finish()
+
+	deployer, err := s.testGetDeployerLocalBundleStrict(c, true)
+	c.Assert(err, jc.ErrorIsNil)
+	c.Assert(deployer.String(), gc.Matches, "deploy local bundle from: .*")
+
+}
+
+func (s *deployerSuite) testGetDeployerLocalBundleStrict(c *gc.C, force bool) (Deployer, error) {
+	s.expectFilesystem()
+
+	cfg := s.basicDeployerConfig()
+	cfg.Series = "bionic"
+	cfg.FlagSet = &gnuflag.FlagSet{}
+	cfg.Force = force
+	s.expectModelType()
+
+	content := `
+      series: xenial
+      descriptn: bundle to fail strict parsing
+      applications:
+          wordpress:
+              charm: wordpress
+              num_units: 1
+              contstraints: "mem=8G"
+          mysql:
+              charm: mysql
+              num_units: 2
+      relations:
+          - ["wordpress:db", "mysql:server"]
+`
+
+	bundlePath := s.makeBundleDir(c, content)
+	s.expectStat(bundlePath, nil)
+	cfg.CharmOrBundle = bundlePath
+
+	factory := s.newDeployerFactory()
+	return factory.GetDeployer(cfg, s.modelConfigGetter, s.resolver)
+}
+
 func (s *deployerSuite) TestGetDeployerCharmStoreBundle(c *gc.C) {
 	bundle := charm.MustParseURL("cs:test-bundle")
 	cfg := s.basicDeployerConfig()
diff --git a/go.mod b/go.mod
index 280ee23d4c3..ec7d0b591e4 100644
--- a/go.mod
+++ b/go.mod
@@ -51,7 +51,7 @@ require (
 	github.com/im7mortal/kmutex v1.0.1
 	github.com/juju/ansiterm v1.0.0
 	github.com/juju/blobstore/v2 v2.0.0
-	github.com/juju/charm/v8 v8.0.1
+	github.com/juju/charm/v8 v8.0.2
 	github.com/juju/charmrepo/v6 v6.0.2
 	github.com/juju/clock v1.0.0
 	github.com/juju/cmd/v3 v3.0.0
diff --git a/go.sum b/go.sum
index fdffae5d146..29554a2c75c 100644
--- a/go.sum
+++ b/go.sum
@@ -496,8 +496,8 @@ github.com/juju/ansiterm v1.0.0 h1:gmMvnZRq7JZJx6jkfSq9/+2LMrVEwGwt7UR6G+lmDEg=
 github.com/juju/ansiterm v1.0.0/go.mod h1:PyXUpnI3olx3bsPcHt98FGPX/KCFZ1Fi+hw1XLI6384=
 github.com/juju/blobstore/v2 v2.0.0 h1:pYXYE7m/RL73EfuwWMQZNuG60jXlL+OsI1qVOM86nwk=
 github.com/juju/blobstore/v2 v2.0.0/go.mod h1:lFTSngYRJBy/mUOWUjAghwKcP0iXxqBYqJtuchC3cJI=
-github.com/juju/charm/v8 v8.0.1 h1:hV34C9nZx0+/PvBH4seAew3S5skZpEcn1vmL1TZ0DPg=
-github.com/juju/charm/v8 v8.0.1/go.mod h1:tZ0JfWOdv11qu4Gm5lPD0KHBeuVUH2vbrKFyYS6JUAw=
+github.com/juju/charm/v8 v8.0.2 h1:SZJ3rI4xndZJVCO/LyQ5XFr6RX6qWgUDiJEnk0kv4kA=
+github.com/juju/charm/v8 v8.0.2/go.mod h1:tZ0JfWOdv11qu4Gm5lPD0KHBeuVUH2vbrKFyYS6JUAw=
 github.com/juju/charmrepo/v6 v6.0.2 h1:5murmFbdrItlF292k7z3H5pY5gheOxhMNZVfdhG0tG8=
 github.com/juju/charmrepo/v6 v6.0.2/go.mod h1:7CWTdKfp00iD9XqlgNpWm1HBBLe09/vGQHwYVPqXouY=
 github.com/juju/clock v0.0.0-20190205081909-9c5c9712527c/go.mod h1:nD0vlnrUjcjJhqN5WuCWZyzfd5AHZAC9/ajvbSx69xA=