diff --git a/@plotly/webpack-dash-dynamic-import/package.json b/@plotly/webpack-dash-dynamic-import/package.json
index 4b7a432ca1..0463d24f6f 100644
--- a/@plotly/webpack-dash-dynamic-import/package.json
+++ b/@plotly/webpack-dash-dynamic-import/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@plotly/webpack-dash-dynamic-import",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "Webpack Plugin for Dynamic Import in Dash",
   "repository": {
     "type": "git",
diff --git a/@plotly/webpack-dash-dynamic-import/src/index.js b/@plotly/webpack-dash-dynamic-import/src/index.js
index b02a7edc70..6071c0a97b 100644
--- a/@plotly/webpack-dash-dynamic-import/src/index.js
+++ b/@plotly/webpack-dash-dynamic-import/src/index.js
@@ -5,7 +5,7 @@ function getFingerprint() {
     const packageJson = JSON.parse(package);
 
     const timestamp = Math.round(Date.now() / 1000);
-    const version = packageJson.version.replace(/[.]/g, '_');
+    const version = packageJson.version.replace(/[^\w-]/g, '_');
 
     return `"v${version}m${timestamp}"`;
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 45a5adff95..fa6827a4b2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 All notable changes to `dash` will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [1.6.0] - 2019-11-04
+### Fixed
+- [#999](https://github.com/plotly/dash/pull/999) Fix fingerprint for component suites with `metadata` in version.
+- [#983](https://github.com/plotly/dash/pull/983) Fix the assets loading issues when dashR application runner is handling with an app defined by string chunk.
+
 ## [1.5.1] - 2019-10-29
 ### Fixed
 - [#987](https://github.com/plotly/dash/pull/987) Fix cache string handling for component suites with nested folders in their packages.
diff --git a/dash/fingerprint.py b/dash/fingerprint.py
index b9c23d3034..78df1d4917 100644
--- a/dash/fingerprint.py
+++ b/dash/fingerprint.py
@@ -1,7 +1,7 @@
 import re
 
 cache_regex = re.compile(r"^v[\w-]+m[0-9a-fA-F]+$")
-
+version_clean = re.compile(r"[^\w-]")
 
 def build_fingerprint(path, version, hash_value):
     path_parts = path.split("/")
@@ -9,7 +9,7 @@ def build_fingerprint(path, version, hash_value):
 
     return "{}.v{}m{}.{}".format(
         "/".join(path_parts[:-1] + [filename]),
-        str(version).replace(".", "_"),
+        re.sub(version_clean, "_", str(version)),
         hash_value,
         extension,
     )
diff --git a/dash/testing/application_runners.py b/dash/testing/application_runners.py
index 44eeb07959..2b23fa7b1f 100644
--- a/dash/testing/application_runners.py
+++ b/dash/testing/application_runners.py
@@ -5,6 +5,7 @@
 import uuid
 import shlex
 import threading
+import shutil
 import subprocess
 import logging
 import inspect
@@ -61,6 +62,7 @@ def __init__(self, keep_open, stop_timeout):
         self.started = None
         self.keep_open = keep_open
         self.stop_timeout = stop_timeout
+        self._tmp_app_path = None
 
     def start(self, *args, **kwargs):
         raise NotImplementedError  # pragma: no cover
@@ -103,6 +105,10 @@ def url(self):
     def is_windows(self):
         return sys.platform == "win32"
 
+    @property
+    def tmp_app_path(self):
+        return self._tmp_app_path
+
 
 class ThreadedRunner(BaseDashRunner):
     """Runs a dash application in a thread.
@@ -261,13 +267,18 @@ def start(self, app, start_timeout=2, cwd=None):
                 cwd = os.path.dirname(app)
                 logger.info("RRunner inferred cwd from app path: %s", cwd)
         else:
-            path = (
-                "/tmp/app_{}.R".format(uuid.uuid4().hex)
-                if not self.is_windows
-                else os.path.join(
-                    (os.getenv("TEMP"), "app_{}.R".format(uuid.uuid4().hex))
-                )
+            self._tmp_app_path = os.path.join(
+                "/tmp" if not self.is_windows else os.getenv("TEMP"),
+                uuid.uuid4().hex,
             )
+            try:
+                os.mkdir(self.tmp_app_path)
+            except OSError:
+                logger.exception(
+                    "cannot make temporary folder %s", self.tmp_app_path
+                )
+            path = os.path.join(self.tmp_app_path, "app.R")
+
             logger.info("RRunner start => app is R code chunk")
             logger.info("make a temporary R file for execution => %s", path)
             logger.debug("content of the dashR app")
@@ -283,11 +294,11 @@ def start(self, app, start_timeout=2, cwd=None):
                 for entry in inspect.stack():
                     if "/dash/testing/" not in entry[1].replace("\\", "/"):
                         cwd = os.path.dirname(os.path.realpath(entry[1]))
+                        logger.warning("get cwd from inspect => %s", cwd)
                         break
             if cwd:
                 logger.info(
-                    "RRunner inferred cwd from the Python call stack: %s",
-                    cwd
+                    "RRunner inferred cwd from the Python call stack: %s", cwd
                 )
             else:
                 logger.warning(
@@ -297,16 +308,40 @@ def start(self, app, start_timeout=2, cwd=None):
                     "dashr.run_server(app, cwd=os.path.dirname(__file__))"
                 )
 
+            # try copying all valid sub folders (i.e. assets) in cwd to tmp
+            # note that the R assets folder name can be any valid folder name
+            assets = [
+                os.path.join(cwd, _)
+                for _ in os.listdir(cwd)
+                if not _.startswith("__")
+                and os.path.isdir(os.path.join(cwd, _))
+            ]
+
+            for asset in assets:
+                target = os.path.join(
+                    self.tmp_app_path, os.path.basename(asset)
+                )
+                if os.path.exists(target):
+                    logger.debug("delete existing target %s", target)
+                    shutil.rmtree(target)
+                logger.debug("copying %s => %s", asset, self.tmp_app_path)
+                shutil.copytree(asset, target)
+                logger.debug("copied with %s", os.listdir(target))
+
         logger.info("Run dashR app with Rscript => %s", app)
+
         args = shlex.split(
-            "Rscript {}".format(os.path.realpath(app)),
+            "Rscript -e 'source(\"{}\")'".format(os.path.realpath(app)),
             posix=not self.is_windows,
         )
         logger.debug("start dash process with %s", args)
 
         try:
             self.proc = subprocess.Popen(
-                args, stdout=subprocess.PIPE, stderr=subprocess.PIPE, cwd=cwd
+                args,
+                stdout=subprocess.PIPE,
+                stderr=subprocess.PIPE,
+                cwd=self.tmp_app_path if self.tmp_app_path else cwd,
             )
             # wait until server is able to answer http request
             wait.until(
diff --git a/dash/version.py b/dash/version.py
index 51ed7c486c..bcd8d54efb 100644
--- a/dash/version.py
+++ b/dash/version.py
@@ -1 +1 @@
-__version__ = '1.5.1'
+__version__ = '1.6.0'
diff --git a/requires-install.txt b/requires-install.txt
index 346a7c4f34..89ae565139 100644
--- a/requires-install.txt
+++ b/requires-install.txt
@@ -2,7 +2,7 @@ Flask>=1.0.2
 flask-compress
 plotly
 dash_renderer==1.2.0
-dash-core-components==1.4.0
+dash-core-components==1.5.0
 dash-html-components==1.0.1
 dash-table==4.5.0
 future
\ No newline at end of file
diff --git a/tests/integration/devtools/test_props_check.py b/tests/integration/devtools/test_props_check.py
index 95d81349ac..b9d7155660 100644
--- a/tests/integration/devtools/test_props_check.py
+++ b/tests/integration/devtools/test_props_check.py
@@ -216,7 +216,7 @@
 
 
 def test_dvpc001_prop_check_errors_with_path(dash_duo):
-    app = dash.Dash(__name__)
+    app = dash.Dash(__name__, eager_loading=True)
 
     app.layout = html.Div([html.Div(id="content"), dcc.Location(id="location")])
 
diff --git a/tests/unit/test_fingerprint.py b/tests/unit/test_fingerprint.py
index 36de80ddcc..97037e7bb5 100644
--- a/tests/unit/test_fingerprint.py
+++ b/tests/unit/test_fingerprint.py
@@ -17,6 +17,12 @@
         "version": "1.1.1-alpha.1",
         "hash": "1234567890abcdef",
     },
+    {
+        "path": "react@16.8.6.min.js",
+        "fingerprint": "react@16.v1_1_1-alpha_x_y_y_X_Y_Z_1_2_3_metadata_xx_yy_zz_XX_YY_ZZ_11_22_33_mmm1234567890abcdefABCDEF.8.6.min.js",
+        "version": "1.1.1-alpha.x.y.y.X.Y.Z.1.2.3+metadata.xx.yy.zz.XX.YY.ZZ.11.22.33.mm",
+        "hash": "1234567890abcdefABCDEF",
+    },
     {"path": "dash.plotly.js", "fingerprint": "dash.v1m1.plotly.js"},
     {"path": "dash.plotly.j_s", "fingerprint": "dash.v1m1.plotly.j_s"},
     {"path": "dash.plotly.css", "fingerprint": "dash.v1m1.plotly.css"},