diff --git a/README.md b/README.md
index 4e9110555..78c11c5ef 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ GitHub wiki: https://github.com/corundum/corundum/wiki
 
 Google group: https://groups.google.com/d/forum/corundum-nic
 
-Slack workspace: https://join.slack.com/t/corundumworkspace/shared_invite/zt-tj5azsbm-V9LV8L7ugSRDBpe2JiPKMA
+Zulip: https://corundum.zulipchat.com/
 
 ## Introduction
 
diff --git a/docs/source/gettingstarted.rst b/docs/source/gettingstarted.rst
index f6deccaf3..d564758ab 100644
--- a/docs/source/gettingstarted.rst
+++ b/docs/source/gettingstarted.rst
@@ -7,7 +7,7 @@ Getting Started
 Join the Corundum community
 ===========================
 
-To stay up to date with the latest developments and get support, consider joining the `mailing list <https://groups.google.com/d/forum/corundum-nic>`_ and `Slack workspace <https://join.slack.com/t/corundumworkspace/shared_invite/zt-tj5azsbm-V9LV8L7ugSRDBpe2JiPKMA>`_.
+To stay up to date with the latest developments and get support, consider joining the `mailing list <https://groups.google.com/d/forum/corundum-nic>`_ and `Zulip <https://corundum.zulipchat.com/>`_.
 
 Obtaining the source code
 =========================
diff --git a/docs/source/index.rst b/docs/source/index.rst
index faba24635..ed003c10b 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -10,7 +10,7 @@ Corundum has several unique architectural features.  First, transmit, receive, c
 
 Corundum also provides an application section for implementing custom logic.  The application section has a dedicated PCIe BAR for control and a number of interfaces that provide access to the core datapath and DMA infrastructure.
 
-The latest source code is available from the `Corundum GitHub repository <https://github.com/corundum/corundum>`_.  To stay up to date with the latest developments and get support, consider joining the `mailing list <https://groups.google.com/d/forum/corundum-nic>`_ and `Slack workspace <https://join.slack.com/t/corundumworkspace/shared_invite/zt-tj5azsbm-V9LV8L7ugSRDBpe2JiPKMA>`_.
+The latest source code is available from the `Corundum GitHub repository <https://github.com/corundum/corundum>`_.  To stay up to date with the latest developments and get support, consider joining the `mailing list <https://groups.google.com/d/forum/corundum-nic>`_ and `Zulip <https://corundum.zulipchat.com/>`_.
 
 Corundum currently supports devices from both Xilinx and Intel, on boards from several different manufacturers.  Designs are included for the following FPGA boards; see :ref:`device_list` for more details: