diff --git a/grimoirelab_toolkit/_version.py b/grimoirelab_toolkit/_version.py
index f1a031b..5d6fd11 100644
--- a/grimoirelab_toolkit/_version.py
+++ b/grimoirelab_toolkit/_version.py
@@ -1,2 +1,2 @@
-# File auto-generated by semverup on 2024-08-02 11:05:01.589058
-__version__ = "1.0.3"
+# File auto-generated by semverup on 2024-08-09 08:31:32.656994
+__version__ = "1.0.4-rc.1"
diff --git a/pyproject.toml b/pyproject.toml
index 8a41c02..79166e1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "grimoirelab-toolkit"
-version = "1.0.3"
+version = "1.0.4-rc.1"
 description = "Toolkit of common functions used across GrimoireLab"
 authors = [
     "GrimoireLab Developers"
diff --git a/releases/1.0.4-rc.1.md b/releases/1.0.4-rc.1.md
new file mode 100644
index 0000000..eada865
--- /dev/null
+++ b/releases/1.0.4-rc.1.md
@@ -0,0 +1,3 @@
+  ## grimoirelab-toolkit 1.0.4-rc.1 - (2024-08-09)
+  
+  * Update Poetry's package dependencies