diff --git a/app/src/main/resources/application.properties b/app/src/main/resources/application.properties
index 267600e..a55a3a2 100644
--- a/app/src/main/resources/application.properties
+++ b/app/src/main/resources/application.properties
@@ -24,19 +24,19 @@ spring.servlet.multipart.max-file-size=5MB
 spring.servlet.multipart.max-request-size=5MB
 ### API ####
 # OpenAI
-spring.ai.openai.api-key=${TALKFORGEAI_OPENAI_APIKEY:}
+spring.ai.openai.api-key=${TALKFORGEAI_OPENAI_APIKEY:<empty>}
 spring.ai.openai.base-url=${TALKFORGEAI_OPENAI_BASE_URL:https://api.openai.com}
 # Mistral
-spring.ai.mistralai.api-key=${TALKFORGEAI_MISTRALAI_APIKEY:}
+spring.ai.mistralai.api-key=${TALKFORGEAI_MISTRALAI_APIKEY:<empty>}
 # Ollama
 spring.ai.ollama.base-url=${TALKFORGEAI_OLLAMA_BASE_URL:http://localhost:11434}
 # Anthropic
-spring.ai.anthropic.api-key=${TALKFORGEAI_ANTHROPIC_APIKEY:}
+spring.ai.anthropic.api-key=${TALKFORGEAI_ANTHROPIC_APIKEY:<empty>}
 spring.ai.anthropic.version=${TALKFORGEAI_ANTHROPIC_VERSION:2023-06-01}
 # Stability
-spring.ai.stabilityai.api-key=${TALKFORGEAI_STABILITYAI_APIKEY:}
+spring.ai.stabilityai.api-key=${TALKFORGEAI_STABILITYAI_APIKEY:<empty>}
 # Elevenlabs
-elevenlabs.api-key=${TALKFORGEAI_ELEVENLABS_APIKEY:}
+elevenlabs.api-key=${TALKFORGEAI_ELEVENLABS_APIKEY:<empty>}
 elevenlabs.api-url=https://api.elevenlabs.io
 ### Database ###
 spring.datasource.url=jdbc:sqlite:${talkforgeai.datadir}/talkforgeai.db