diff --git a/.circleci/config.yml b/.circleci/config.yml
index 8faf8bbd..6eb63477 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -10,18 +10,10 @@ jobs:
       CIRCLE_ARTIFACTS: /tmp/circleci-artifacts
       CIRCLE_TEST_REPORTS: /tmp/circleci-test-results
       COMPILE: --compile
-    # In CircleCI 1.0 we used a pre-configured image with a large number of languages and other packages.
-    # In CircleCI 2.0 you can now specify your own image, or use one of our pre-configured images.
-    # The following configuration line tells CircleCI to use the specified docker image as the runtime environment for you job.
-    # We have selected a pre-built image that mirrors the build environment we use on
-    # the 1.0 platform, but we recommend you choose an image more tailored to the needs
-    # of each job. For more information on choosing an image (or alternatively using a
-    # VM instead of a container) see https://circleci.com/docs/2.0/executor-types/
     # To see the list of pre-built images that CircleCI provides for most common languages see
     # https://circleci.com/docs/2.0/circleci-images/
-    machine:
-      python:
-        version: 2.7.14
+    docker:
+    - image: circleci/python:3.7.3
     steps:
     # Machine Setup
     #   If you break your build into multiple jobs with workflows, you will probably want to do the parts of this that are relevant in each
diff --git a/__pkginfo__.py b/__pkginfo__.py
index 60ec1573..c6993049 100644
--- a/__pkginfo__.py
+++ b/__pkginfo__.py
@@ -58,7 +58,7 @@ entry_points       = {
     ]}
 ftp_url            = None
 install_requires   = ["spark-parser >= 1.8.9, < 1.9.0",
-                      "xdis >= 4.2.0, < 4.3.0"]
+                      "xdis >= 4.2.1, < 4.3.0"]
 
 license            = "GPL3"
 mailing_list       = "python-debugger@googlegroups.com"