diff --git a/.github/workflows/changelog.yaml b/.github/workflows/changelog.yaml
index a3ed4a3a7..707a26564 100644
--- a/.github/workflows/changelog.yaml
+++ b/.github/workflows/changelog.yaml
@@ -21,7 +21,7 @@ jobs:
 
       - name: Install towncrier
         run: |
-          $CONDA/bin/conda install -c conda-forge towncrier -y
+          $CONDA/bin/conda install -c conda-forge towncrier=23 -y
   
       - name: Run towncrier check command
         run: |
diff --git a/doc/news/interface_changes/CAP-1051.atcamera.rst b/doc/news/interface_changes/CAP-1051.atcamera.rst
new file mode 100644
index 000000000..8c173ed33
--- /dev/null
+++ b/doc/news/interface_changes/CAP-1051.atcamera.rst
@@ -0,0 +1 @@
+Make initGuiders roiSpec length 1 (unlimited)
diff --git a/doc/news/interface_changes/CAP-1051.cccamera.rst b/doc/news/interface_changes/CAP-1051.cccamera.rst
new file mode 100644
index 000000000..8c173ed33
--- /dev/null
+++ b/doc/news/interface_changes/CAP-1051.cccamera.rst
@@ -0,0 +1 @@
+Make initGuiders roiSpec length 1 (unlimited)
diff --git a/doc/news/interface_changes/CAP-1051.mtcamera.rst b/doc/news/interface_changes/CAP-1051.mtcamera.rst
new file mode 100644
index 000000000..8c173ed33
--- /dev/null
+++ b/doc/news/interface_changes/CAP-1051.mtcamera.rst
@@ -0,0 +1 @@
+Make initGuiders roiSpec length 1 (unlimited)
diff --git a/python/lsst/ts/xml/data/sal_interfaces/ATCamera/ATCamera_Commands.xml b/python/lsst/ts/xml/data/sal_interfaces/ATCamera/ATCamera_Commands.xml
index 6c356c706..19c401d25 100644
--- a/python/lsst/ts/xml/data/sal_interfaces/ATCamera/ATCamera_Commands.xml
+++ b/python/lsst/ts/xml/data/sal_interfaces/ATCamera/ATCamera_Commands.xml
@@ -62,9 +62,9 @@
     <EFDB_Topic>ATCamera_command_initGuiders</EFDB_Topic>
     <item>
       <EFDB_Name>roiSpec</EFDB_Name>
-      <Description>TBD specification for region of interest</Description>
+      <Description>Specification for region of interest</Description>
       <IDL_Type>string</IDL_Type>
-      <IDL_Size>256</IDL_Size>
+      <IDL_Size>1</IDL_Size>
       <Units>unitless</Units>
       <Count>1</Count>
     </item>
diff --git a/python/lsst/ts/xml/data/sal_interfaces/CCCamera/CCCamera_Commands.xml b/python/lsst/ts/xml/data/sal_interfaces/CCCamera/CCCamera_Commands.xml
index 309631560..31cef7024 100644
--- a/python/lsst/ts/xml/data/sal_interfaces/CCCamera/CCCamera_Commands.xml
+++ b/python/lsst/ts/xml/data/sal_interfaces/CCCamera/CCCamera_Commands.xml
@@ -62,9 +62,9 @@
     <EFDB_Topic>CCCamera_command_initGuiders</EFDB_Topic>
     <item>
       <EFDB_Name>roiSpec</EFDB_Name>
-      <Description>TBD specification for region of interest</Description>
+      <Description>Specification for region of interest</Description>
       <IDL_Type>string</IDL_Type>
-      <IDL_Size>256</IDL_Size>
+      <IDL_Size>1</IDL_Size>
       <Units>unitless</Units>
       <Count>1</Count>
     </item>
diff --git a/python/lsst/ts/xml/data/sal_interfaces/MTCamera/MTCamera_Commands.xml b/python/lsst/ts/xml/data/sal_interfaces/MTCamera/MTCamera_Commands.xml
index 5d9104155..86ebf764f 100644
--- a/python/lsst/ts/xml/data/sal_interfaces/MTCamera/MTCamera_Commands.xml
+++ b/python/lsst/ts/xml/data/sal_interfaces/MTCamera/MTCamera_Commands.xml
@@ -62,9 +62,9 @@
     <EFDB_Topic>MTCamera_command_initGuiders</EFDB_Topic>
     <item>
       <EFDB_Name>roiSpec</EFDB_Name>
-      <Description>TBD specification for region of interest</Description>
+      <Description>Specification for region of interest</Description>
       <IDL_Type>string</IDL_Type>
-      <IDL_Size>256</IDL_Size>
+      <IDL_Size>1</IDL_Size>
       <Units>unitless</Units>
       <Count>1</Count>
     </item>