diff --git a/.devcontainer/ui-lovelace.yaml b/.devcontainer/ui-lovelace.yaml
index fd5a1c3..9de1ee2 100644
--- a/.devcontainer/ui-lovelace.yaml
+++ b/.devcontainer/ui-lovelace.yaml
@@ -970,3 +970,24 @@ views:
             graph_span: 1m
             series:
               - entity: sensor.counter_no_significant_update
+
+          - type: custom:apexcharts-card
+            header:
+              show: true
+              title: Significant Updates
+            graph_span: 1h
+            apex_config:
+              xaxis:
+                labels:
+                  formatter: >
+                    EVAL:function(value) {
+                      return "42";
+                    }
+              yaxis:
+                labels:
+                  formatter: |
+                    EVAL:function(value) {
+                      return "42";
+                    }
+            series:
+              - entity: sensor.random0_100
diff --git a/README.md b/README.md
index 654f6f2..5ada603 100644
--- a/README.md
+++ b/README.md
@@ -439,6 +439,22 @@ apex_config:
       enabled: true
 ```
 
+Some options in ApexCharts can take a javascript function as an argument. To make this possible, you'll have to prefix your function with `EVAL:`.
+
+:warning: While using this `EVAL:` feature, there is no safeguard so use at your own risk.
+
+Here is an example:
+
+```yaml
+apex_config:
+  yaxis:
+    labels:
+      formatter: |
+        EVAL:function(value) {
+          return "42";
+        }
+```
+
 ### Layouts
 
 For now, only `minimal` is supported: It will remove the grid, the axis and display the legend at the top. But you can use the `apex_config` to do whatever you want.
diff --git a/src/apex-layouts.ts b/src/apex-layouts.ts
index 8233dd0..78ffaae 100644
--- a/src/apex-layouts.ts
+++ b/src/apex-layouts.ts
@@ -93,7 +93,9 @@ export function getLayoutConfig(config: ChartCardConfig, hass: HomeAssistant | u
       break;
   }
 
-  return config.apex_config ? mergeDeep(mergeDeep(def, conf), config.apex_config) : mergeDeep(def, conf);
+  return config.apex_config
+    ? mergeDeep(mergeDeep(def, conf), evalApexConfig(config.apex_config))
+    : mergeDeep(def, conf);
 }
 
 export function getBrushLayoutConfig(
@@ -164,7 +166,7 @@ export function getBrushLayoutConfig(
       text: 'Loading...',
     },
   };
-  return config.brush?.apex_config ? mergeDeep(def, config.brush.apex_config) : def;
+  return config.brush?.apex_config ? mergeDeep(def, evalApexConfig(config.brush.apex_config)) : def;
 }
 
 function getFillOpacity(config: ChartCardConfig, brush: boolean): number[] {
@@ -432,3 +434,17 @@ function getFillType(config: ChartCardConfig, brush: boolean) {
     });
   }
 }
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+function evalApexConfig(apexConfig: any): any {
+  const eval2 = eval;
+  Object.keys(apexConfig).forEach((key) => {
+    if (typeof apexConfig[key] === 'string' && apexConfig[key].trim().startsWith('EVAL:')) {
+      apexConfig[key] = eval2(`(${apexConfig[key].trim().slice(5)})`);
+    }
+    if (typeof apexConfig[key] === 'object') {
+      apexConfig[key] = evalApexConfig(apexConfig[key]);
+    }
+  });
+  return apexConfig;
+}