diff --git a/steps/computemd5.cwl b/steps/computemd5.cwl
index 8da59c6cc4351175f5be1525819e973846a3088e..7afc3cb0a0a869c415681896204be399213dcd12 100644
--- a/steps/computemd5.cwl
+++ b/steps/computemd5.cwl
@@ -22,4 +22,4 @@ requirements:
   - class: InlineJavascriptRequirement
 hints:
   - class: DockerRequirement
-    dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:latest
\ No newline at end of file
+    dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:v0.5.7
\ No newline at end of file
diff --git a/steps/double_tgz_elimination.cwl b/steps/double_tgz_elimination.cwl
index 557c5268755184ea95128ce3541721528b4c453b..fcd9bb10b955a8f838aef49880acdbb5bbe7ea8e 100644
--- a/steps/double_tgz_elimination.cwl
+++ b/steps/double_tgz_elimination.cwl
@@ -47,6 +47,6 @@ baseCommand:
 
 hints:
   - class: DockerRequirement
-    dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:latest
+    dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:v0.5.7
 requirements:
   - class: InlineJavascriptRequirement
\ No newline at end of file
diff --git a/steps/extract_metadata.cwl b/steps/extract_metadata.cwl
index 9def555865c2873daf4200cdc0d516345d7321b2..08d9751c702c16f8ff179930d4287ea8bd08b06f 100644
--- a/steps/extract_metadata.cwl
+++ b/steps/extract_metadata.cwl
@@ -32,4 +32,4 @@ requirements:
   - class: InlineJavascriptRequirement
 hints:
   - class: DockerRequirement
-    dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:latest
+    dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:v0.5.7
diff --git a/steps/join_contents.cwl b/steps/join_contents.cwl
index 3bc520073db2c41ceca67104d158d2c4802595e5..71474a34fce2f01f1214d3e45036838e2ed84fa0 100644
--- a/steps/join_contents.cwl
+++ b/steps/join_contents.cwl
@@ -68,4 +68,4 @@ baseCommand:
 
 hints:
 - class: DockerRequirement
-  dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:latest
+  dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:v0.5.7
diff --git a/steps/requantize.cwl b/steps/requantize.cwl
index a3861986a95911ddc1a77554d4676e0e350754e2..4e6c6a9312dded2740e905f659bb21c97769efe0 100644
--- a/steps/requantize.cwl
+++ b/steps/requantize.cwl
@@ -58,4 +58,4 @@ baseCommand:
 
 hints:
 - class: DockerRequirement
-  dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:latest
+  dockerPull: git.astron.nl:5000/ldv/bf_double_tgz:v0.5.7