diff --git a/.docker-files/entrypoint.sh b/.docker-files/entrypoint.sh
index 68063d5..8f8c9eb 100644
--- a/.docker-files/entrypoint.sh
+++ b/.docker-files/entrypoint.sh
@@ -20,7 +20,7 @@ clone_develop() {
 	friendica_git="${FRIENDICA_VERSION}"
 	addons_git="${FRIENDICA_ADDONS}"
 
-	if echo "${friendica_git,,}" | grep -Eq '^.*\-dev'; then
+	if echo "{$friendica_git,,}" | grep -Eq '^.*\-dev'; then
 		friendica_git="develop"
 	fi
 
diff --git a/2019.03/apache/entrypoint.sh b/2019.03/apache/entrypoint.sh
index 68063d5..8f8c9eb 100644
--- a/2019.03/apache/entrypoint.sh
+++ b/2019.03/apache/entrypoint.sh
@@ -20,7 +20,7 @@ clone_develop() {
 	friendica_git="${FRIENDICA_VERSION}"
 	addons_git="${FRIENDICA_ADDONS}"
 
-	if echo "${friendica_git,,}" | grep -Eq '^.*\-dev'; then
+	if echo "{$friendica_git,,}" | grep -Eq '^.*\-dev'; then
 		friendica_git="develop"
 	fi
 
diff --git a/2019.03/fpm-alpine/entrypoint.sh b/2019.03/fpm-alpine/entrypoint.sh
index 68063d5..8f8c9eb 100644
--- a/2019.03/fpm-alpine/entrypoint.sh
+++ b/2019.03/fpm-alpine/entrypoint.sh
@@ -20,7 +20,7 @@ clone_develop() {
 	friendica_git="${FRIENDICA_VERSION}"
 	addons_git="${FRIENDICA_ADDONS}"
 
-	if echo "${friendica_git,,}" | grep -Eq '^.*\-dev'; then
+	if echo "{$friendica_git,,}" | grep -Eq '^.*\-dev'; then
 		friendica_git="develop"
 	fi
 
diff --git a/2019.03/fpm/entrypoint.sh b/2019.03/fpm/entrypoint.sh
index 68063d5..8f8c9eb 100644
--- a/2019.03/fpm/entrypoint.sh
+++ b/2019.03/fpm/entrypoint.sh
@@ -20,7 +20,7 @@ clone_develop() {
 	friendica_git="${FRIENDICA_VERSION}"
 	addons_git="${FRIENDICA_ADDONS}"
 
-	if echo "${friendica_git,,}" | grep -Eq '^.*\-dev'; then
+	if echo "{$friendica_git,,}" | grep -Eq '^.*\-dev'; then
 		friendica_git="develop"
 	fi
 
diff --git a/2019.06-dev/apache/entrypoint.sh b/2019.06-dev/apache/entrypoint.sh
index 68063d5..8f8c9eb 100644
--- a/2019.06-dev/apache/entrypoint.sh
+++ b/2019.06-dev/apache/entrypoint.sh
@@ -20,7 +20,7 @@ clone_develop() {
 	friendica_git="${FRIENDICA_VERSION}"
 	addons_git="${FRIENDICA_ADDONS}"
 
-	if echo "${friendica_git,,}" | grep -Eq '^.*\-dev'; then
+	if echo "{$friendica_git,,}" | grep -Eq '^.*\-dev'; then
 		friendica_git="develop"
 	fi
 
diff --git a/2019.06-dev/fpm-alpine/entrypoint.sh b/2019.06-dev/fpm-alpine/entrypoint.sh
index 68063d5..8f8c9eb 100644
--- a/2019.06-dev/fpm-alpine/entrypoint.sh
+++ b/2019.06-dev/fpm-alpine/entrypoint.sh
@@ -20,7 +20,7 @@ clone_develop() {
 	friendica_git="${FRIENDICA_VERSION}"
 	addons_git="${FRIENDICA_ADDONS}"
 
-	if echo "${friendica_git,,}" | grep -Eq '^.*\-dev'; then
+	if echo "{$friendica_git,,}" | grep -Eq '^.*\-dev'; then
 		friendica_git="develop"
 	fi
 
diff --git a/2019.06-dev/fpm/entrypoint.sh b/2019.06-dev/fpm/entrypoint.sh
index 68063d5..8f8c9eb 100644
--- a/2019.06-dev/fpm/entrypoint.sh
+++ b/2019.06-dev/fpm/entrypoint.sh
@@ -20,7 +20,7 @@ clone_develop() {
 	friendica_git="${FRIENDICA_VERSION}"
 	addons_git="${FRIENDICA_ADDONS}"
 
-	if echo "${friendica_git,,}" | grep -Eq '^.*\-dev'; then
+	if echo "{$friendica_git,,}" | grep -Eq '^.*\-dev'; then
 		friendica_git="develop"
 	fi