diff --git a/CHANGELOG.md b/CHANGELOG.md
index db42d1a5..02f145fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,12 @@ Unreleased
 ----------
  -
  
-v1.5.3 (2020-10-29)
+ v1.5.5 (2021-03-26)
+ -------------------
+ **Bugfixes***
+ - Fixed an issue with JSON parsing that caused the `publish_model` task to fail with Viya 4.0.
+ 
+v1.5.4 (2020-10-29)
  ------------------
  **Improvements**
  - Added the `as_swat` method to the `Session` object, allowing connection to CAS through SWAT without an additional authentication step.
diff --git a/src/sasctl/__init__.py b/src/sasctl/__init__.py
index 89a1c2c6..7d121b78 100644
--- a/src/sasctl/__init__.py
+++ b/src/sasctl/__init__.py
@@ -4,7 +4,7 @@
 # Copyright © 2019, SAS Institute Inc., Cary, NC, USA.  All Rights Reserved.
 # SPDX-License-Identifier: Apache-2.0
 
-__version__ = '1.5.4'
+__version__ = '1.5.5'
 __author__ = 'SAS'
 __credits__ = ['Yi Jian Ching, Lucas De Paula, James Kochuba, Peter Tobac, '
                'Chris Toth, Jon Walker']
diff --git a/src/sasctl/tasks.py b/src/sasctl/tasks.py
index e930ee87..68deaf41 100644
--- a/src/sasctl/tasks.py
+++ b/src/sasctl/tasks.py
@@ -702,7 +702,9 @@ def _parse_module_url(msg):
         module_url = get_link(details, 'module')
         module_url = module_url.get('href')
     except json.JSONDecodeError:
-        match = re.search(r'(?:rel=module, href=(.*?),)', msg)
+        match = re.search(r'(?:rel=module, href=(.*?),)', msg)               # Vya 3.5
+        if match is None:
+            match = re.search(r'(?:Rel: module URI: (.*?) MediaType)', msg)  # Format changed in Viya 4.0
         module_url = match.group(1) if match else None
 
     return module_url