diff --git a/README.md b/README.md
index 486c10e0..e64f8e7a 100644
--- a/README.md
+++ b/README.md
@@ -135,11 +135,12 @@ The project is licensed under the [BSD 3-Clause license](https://github.com/pysa
 
 ## Citation
 
-If you use PySAL-spopt in a scientific publication, we would appreciate using the following citation:
+If you use PySAL-spopt in a scientific publication, we would appreciate using the following citations:
 
 ```
 @misc{spopt2021,
-    author    = {Feng, Xin, and Gaboardi, James D. and Knaap, Elijah and Rey, Sergio J. and Wei, Ran},
+    author    = {Feng, Xin, and Gaboardi, James D. and Knaap, Elijah and
+                Rey, Sergio J. and Wei, Ran},
     month     = {jan},
     year      = {2021},
     title     = {pysal/spopt},
@@ -147,6 +148,21 @@ If you use PySAL-spopt in a scientific publication, we would appreciate using th
     doi       = {10.5281/zenodo.4444156},
     keywords  = {python,regionalization,spatial-optimization,location-modeling}
 }
+
+@article{spopt2022,
+    author    = {Feng, Xin and Barcelos, Germano and Gaboardi, James D. and
+                Knaap, Elijah and Wei, Ran and Wolf, Levi J. and
+                Zhao, Qunshan and Rey, Sergio J.},
+    year      = {2022},
+    title     = {spopt: a python package for solving spatial optimization problems in PySAL},
+    journal   = {Journal of Open Source Software}
+    publisher = {The Open Journal},
+    volume    = {7},
+    number    = {74},
+    pages     = {3330},
+    url       = {https://doi.org/10.21105/joss.03330},
+    doi       = {10.21105/joss.03330},
+}
 ```
 
 ## Funding
diff --git a/docs/index.rst b/docs/index.rst
index 24c0c918..ce9311be 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -72,7 +72,7 @@ Development
 Citing **spopt**
 ----------------
 
-If you use **PySAL-spopt** in a scientific publication, we would appreciate citations to the following paper::
+If you use **PySAL-spopt** in a scientific publication, we would appreciate citations to the following::
 
   @misc{spopt2021,
     author    = {Feng, Xin, and 
@@ -88,6 +88,20 @@ If you use **PySAL-spopt** in a scientific publication, we would appreciate cita
     keywords  = {python,regionalization,spatial-optimization,location-modeling}
   }
 
+  @article{spopt2022,
+    author    = {Feng, Xin and Barcelos, Germano and Gaboardi, James D. and
+                Knaap, Elijah and Wei, Ran and Wolf, Levi J. and
+                Zhao, Qunshan and Rey, Sergio J.},
+    year      = {2022},
+    title     = {spopt: a python package for solving spatial optimization problems in PySAL},
+    journal   = {Journal of Open Source Software}
+    publisher = {The Open Journal},
+    volume    = {7},
+    number    = {74},
+    pages     = {3330},
+    url       = {https://doi.org/10.21105/joss.03330},
+    doi       = {10.21105/joss.03330},
+  }
 
 
 Funding