diff --git a/Taskfile.yml b/Taskfile.yml
index d522c09..3f0230f 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -18,6 +18,7 @@ tasks:
     cmds:
       - tasks/03-ba-sachsen.sh "output/02-bibliotheca-main"
     sources:
+      - tasks/03-ba-sachsen.sh
 #     - output/02-alephino-main/alephino.csv
       - output/02-bibliotheca-main/bibliotheca.csv
     generates:
@@ -34,6 +35,7 @@ tasks:
       - task: riesa
       - tasks/02-alephino-main.sh "output/01-alephino-pre"
     sources:
+      - tasks/02-alephino-main.sh
       - output/01-alephino-pre/*.tsv
     generates:
 #     - output/02-alephino-main/alephino.csv
@@ -54,6 +56,7 @@ tasks:
 #     - task: plauen
       - tasks/02-bibliotheca-main.sh "output/01-bibliotheca-pre"
     sources:
+      - tasks/02-bibliotheca-main.sh
       - output/01-bibliotheca-pre/*.tsv
     generates:
       - output/02-bibliotheca-main/bibliotheca.csv
@@ -68,6 +71,7 @@ tasks:
     cmds:
       - tasks/01-bibliotheca-pre.sh "{{.INPUT}}"
     sources:
+      - tasks/01-bibliotheca-pre.sh
       - '{{.INPUT}}'
     generates:
       - output/01-bibliotheca-pre/bautzen.tsv
@@ -84,6 +88,7 @@ tasks:
     cmds:
       - tasks/01-bibliotheca-pre.sh "{{.INPUT}}"
     sources:
+      - tasks/01-bibliotheca-pre.sh
       - '{{.INPUT}}'
     generates:
       - output/01-bibliotheca-pre/breitenbrunn.tsv
@@ -100,6 +105,7 @@ tasks:
     cmds:
       - tasks/01-bibliotheca-pre.sh "{{.INPUT}}"
     sources:
+      - tasks/01-bibliotheca-pre.sh
       - '{{.INPUT}}'
     generates:
       - output/01-bibliotheca-pre/dresden.tsv
@@ -116,6 +122,7 @@ tasks:
     cmds:
       - tasks/01-alephino-pre.sh "{{.TITEL}}" "{{.EXEMPLARE}}"
     sources:
+      - tasks/01-alephino-pre.sh
       - '{{.TITEL}}'
       - '{{.EXEMPLARE}}'
     generates:
@@ -134,6 +141,7 @@ tasks:
     cmds:
       - tasks/01-bibliotheca-pre.sh "{{.INPUT}}"
     sources:
+      - tasks/01-bibliotheca-pre.sh
       - '{{.INPUT}}'
     generates:
       - output/01-bibliotheca-pre/glauchau.tsv
@@ -150,6 +158,7 @@ tasks:
     cmds:
       - tasks/01-bibliotheca-pre.sh "input/plauen.imp"
     sources:
+      - tasks/01-bibliotheca-pre.sh
       - input/plauen.imp
     generates:
       - output/01-bibliotheca-pre/plauen.tsv
@@ -164,6 +173,7 @@ tasks:
     cmds:
       - tasks/01-alephino-pre.sh "{{.TITEL}}" "{{.EXEMPLARE}}"
     sources:
+      - tasks/01-alephino-pre.sh
       - '{{.TITEL}}'
       - '{{.EXEMPLARE}}'
     generates: